Hi Guinevere, I read your other (new) posts and first I want to say I’m sorry you are having such a horrible time with your symptoms. Anyone would feel scared, stressed, and distressed about them. You have come to the right place for support and information on this board!
As others have mentioned, there seems to be a close connection between MDDS and migraine–presumably they are variants of the same thing. Does anyone in your family (parents, siblings, children) have migraines? If so, you are very possibly a migraineur without knowing it. (I had had low-level dizziness for 16 years before finding out I was a migraineur–when a visual aura came out of the blue!) Do you have a history of headaches?
I must also echo what others have said about trying meds. Many of them have side effects, but those vary greatly among individuals. (For example, I just saw one poster who said nortriptyline wasn’t sedating for her, or not very–but I’m trying it now and that was the biggest side effect for me–although it seems to be waning.) Many side effects go away if you can tolerate them for a little while. Finding the right medication can CHANGE YOUR LIFE. You owe it to yourself and your family to give it a try, under the guidance of caring and knowledgeable doctor, which can be a PCP or a neurologist or whoever you find. All they need is interest, knowledge (or a willingness to get some), and a prescription pad!
I too had a sudden event which triggered a “worse” period in my life, and that is a common story here, I think. I have been lucky and my dizziness problems are not nearly as severe as yours and others’, but still it was a real struggle to try to figure out what was wrong, what could be done about it, and how I could adapt when I had so much trouble working. I was so sad when I thought I was going to have to permanently quit my beloved copyediting work, but I WAS able to go back to it in time.
After a huge, hours-long dizzy spell in 1983, when I was 26, I had a very slowly increasing low-level but constant woozy-fogginess thing worsened by head motion. I just thought I was lazy and needed to slap myself across the face to concentrate better. In 1999 I sneezed hard and instantly lost the hearing in my left ear and had much worse dizziness. The dizziness settled back to its “normal” level after a few weeks but then got worse a couple months later, along with other odd neurological symptoms that remain unexplained to this day. (As does my dizziness, for which I have no official diagnosis, but I have self-diagnosed it as VM.)
Anyway, I was working as a freelance copyeditor, not writing, but copyediting scholarly manuscripts for university presses. Imagine trying to concentrate on that while dizzy! I can imagine that trying to home-school children is next to impossible!! I was fortunate to not suffer vertigo (spinning) or nausea unless severely provoked by too much head motion.
Eventually I had to change jobs (very regretfully) and became a library clerk, which I could manage because it was easier to concentrate when someone (library patrons) or something (piles of books to check in) are right in front of you demanding your attention. When you are FORCED to concentrate by something outside yourself, it’s easier to do. (Though still not exactly fun.)
In 2004 I discovered the magic pill, in my case Strattera (for ADD, although I don’t really have that), a norepinephrine reuptake inhibitor. This was after the dizziness-specialist neurologist had had me try Provigil and Ritalin in order to be able to concentrate through the constant “dizzyfog,” as I call it. All those meds helped greatly but Strattera was the best. I took it for 9 years (and went back to copyediting part-time, remaining part-time at the library) and am just now trying nortriptyline after a failed trial of venlafaxine, which didn’t seem to make me feel significantly better. (I stopped Strattera because my insurance changed and it got VERY expensive for me; also I wanted to try something that might actually lower the frequency of migraine events.)
So, to get to your actual question–I am really sorry to hear that the vertigo and nausea have derailed your novel FOR NOW–what I really want to say is, do NOT, NOT, NOT let yourself think that this will be a permanent situation. Most people DO get better, and most people find that help through (if avoiding triggers doesn’t work) finding the right medication. It can be a long and difficult haul to find the right med, but you CAN get your life back.
Also I forgot to ask, how old are you? If you are near menopause, you may feel much better once your hormones stabilize. That can take a long time (years), but I know that all my “weird stuff” occurred just when perimenopause hit me bigtime, and things stabilized after a couple of years even though I didn’t hit final menopause until five years later. (I’m a slowpoke. 
For now, let me echo what someone said to you on another thread (sorry I cannot remember the name). KIDS ARE RESILIENT. You are ill at the moment. You are very stressed by the whole thing, as anyone would be. You need to let go and lower your stress level, because this will be a true vicious circle–anxiety and dizziness go together like a horse and carriage, to quote the old song. (There is a physiological explanation for this–your vestibular system is “wired into” the sympathetic nervous system, the “fight-or-flight” response. This is why it’s ESSENTIAL to control stress and anxiety in order to treat dizziness).
To be the best mother and wife you can, you ABSOLUTELY NEED to take care of yourself first. You know on the plane, they say in case of depressurization, secure your own oxygen mask first, then help others. Your kids will be BEST SERVED by having a teacher who is not sick. If you were a teacher in a school, would you go to work every day and try to do your job in your condition? No. So why not let someone else teach your kids until you get better and can take over again?
Also as the other person said (if I go back and try to find his/her name, I’ll lose my typing here…), if you are in the military, are there any resources for family help that you can draw on? Counseling, medical advocacy, help with child care, help connecting to other resources in the community, etc.?
I understand how important a book can be, so I have no doubt about your novel being your “baby.” You cannot and will not let go of it, and you won’t need to. You might have to put things on hold awhile or slow down, but keep the faith. You WILL get it published. I am not a writer, but I have my own “baby” of a book that consumes my life, namely a book that my late aunt wrote and that I’m going to publish. I love it because it’s an incredibly important, amazing and delightful and exciting part of my life now. So don’t throw away your dreams–you need them, and your book, your children, and your husband need you. They need you to be as healthy as you can be, so keep trying to find something–it’s probably going to be a medication–that will help you.
If you have to change doctors, so be it, and you may have to do your own advocating for yourself. Do some research on the various migraine meds (lots of info on this board–see the various “sticky” posts), ask for advice here, go to your doctor with some ideas and ask what they think. You will probably want to try a migraine preventive that is also good for anxiety, or something else, depending on any other health conditions you have. If you are not getting good guidance (and RESPECT) from your doctor, change doctors.
Most importantly, do NOT give up and do NOT think that because the last few months have been hell, the rest of your life will be. You cannot allow yourself to despair, because #1 it’s wrong (you WILL get better–everyone does, to some extent) and #2 your family and your book need you to hang in there and get better–FOR THEM as well as for yourself.
Have you seen a neurologist who truly specializes in dizziness? Gotten second or third opinions if necessary?
Very best wishes to you, and please just look forward to the time (that WILL come) when you are better. Even if you have some symptoms, some struggle with it, all your life, that doesn’t mean it will be always be hellish like it is now. You are in a crisis period, but it WILL get better.
Take care,
Nancy