Just would like to add one more thought:
The tests are mostly an initial workup … once you are through them you will rarely have additional tests scheduled (save perhaps the odd hearing tests etc.) and you get to have a more peaceful existence 
So steel yourself as you need for the initial testing but remember that there is light very close at the end of a pretty short tunnel.
Also remember, doctors & clinicians design these tests so as not to harm you in any way though they naturally can bring on fluctuations in symptoms.
Good luck today!