A rheumatologist deals with autoimmune diseases, etc.
Very handy for ruling out other causes.

One thing about the McDonald criteria: Seems to me all the other pieces of the puzzle have to fit AFTER a positive MRI. So...when you have 2 or more symptoms separated by time and space that means: You had an issue with your "leg" in January and then an issue with your "arm" in September. (These are examples of course).
Mine where a numbness around my midsection in 1992 and then numbness up the right side of my body in 2001. Doctor declared these two episodes as "my 2 symptoms separated by time and space".

You are in the most scary time right now......before any diagnosis. Its is far more frightening to face the unknown. It actually can be a relief to get a diagnosis.

The shocks you get do sound like nerve issues. I get them also but not very often. One time I was getting them in my head until I figured out that it was a withdrawl symptom from my antidepressant! Very scary. The doctors will need to address that issue since it has knocked you off your feet without warning. I would highly stress to your doctors your concern of getting hurt if this should continue happening. Perhaps a nerve conduction test would be helpful??

I'm not surprised your MS Neuro didn't mention that you could still end up having MS....later down the line. I don't think any doctor would say that to you without some sort of proof to back it up. That would be something that could put some people right over the edge. My Neuro pretty much said "okay, not MS!" when my MRI was clear.......but later after my MRI showed up positive, she said she suspected it all along.

Hang in there Every one of us understands what you are going through right now regardless of what kind of diagnosis you end up with. It worth mentioning to your doctor the same fears and frustrations you have shared with us. The worst part is not knowing what's going on and feeling like you are nuts because they can't figure out what's wrong with you! ♥