When my health blew up 11ys ago, that's similar to how I presented. It started one night with mild dizziness (I was driving and it was like I was drunk-my eyes were slow to respond to head movement), and the next morning I woke up and walked into a wall. Quickly, I ended up with double vision because my eyes were not moving (several cranial nerve palsies, especially 6th) and loss of balance. I experienced the eyeball freezing one night (and then they were ripping up into the top of my head-excrutiating) and went to the ER. At the time, I was also experiencing several MS symptoms including trouble swallowing and at that moment, loss of ability to urinate. MRIs and lumbar punctures were all negative, but they put me on high dose steroids in the hospital, which I tapered off of when I got out. My symptoms were resolving slowly, but at one point after a stair-step reduction in the steroids, the dizziness/eye problems increased again, so I had to increase the steroids back up and slow the taper. A month after that hospitalization, I ended up in the ER with status epilepticus (numerous seizures while unconscious), so they put me on anti-seizure meds; otherwise, they didn't know what was causing my problems. I was fatigued for months, had my thyroid med changed, more testing, ultimately diagnosed with adrenal insufficiency and put on cortef (a steroid).
Now.....with new docs....they are thinking all of that may have been related to an autoimmune crisis. It fits, and the absolutely newest diagnosis, as of last month, is that it may be Sjogren's! It's pretty new thinking to realize that that disease causes neurological problems, but many people with the autoantibodies actually do experience a similar cluster of "random" symptoms. The neuro specialist who said this said that MS and Sjogren's present very similarly, so if MS is ruled out, it's diagnosed as Sjogren's (plus I am SSb positive). I have been seeing a rheumatologist for the autoimmune stuff. Last year, I tried plaquenil (the "intro" level medication) but had an allergic reaction to it (doh), so had to stop. The next step is azothioprine, which I've been resisting, but know I should try.
My docs are also thinking that the cortef I was on for 10 ys was possibly helping to mask the problem. My endo says he doesn't want me on it if I don't need to be on it (I tried reducing it last year to see if I needed it, which is when my symptoms worsened again), but my other docs recognized that it's a bad idea to take me completely off it until we figure out what's going on and how to help!