Increased Effexor to 112.5 mg now I feel like crap

This is my first time posting, but I have been reading this board for months. I am sorry if this is a repeat question. So I started taking Effexor XR 75 for MAV in August. I was previously on Prozac for years due to preexisting anxiety and depression. Anyways, about 3-4 weeks in I was feeling pretty good 80-90% of the time. I started feeling the anxiety and MAV creeping back a few weeks ago, so my doc upped my dosage of Effexor to 112.5mg. I have been taking that dose about 17 days and I keep having dizzy spells. It’s like the floor is dropping. I had not previosly had severe vertigo before, just more of the dizzy, woozy, drunk feeling. Is this normal for a med increase after 17 days? Has anyone experienced this? I am feeling so discouraged right now.

Thanks for your help and feedback.