hey I have same problem.
start having double vision 3 years ago, searched for everything, brain MR, antibodies, hormones, everything clear. It lasted for a 6 months. for next 2 years I was ok, and it started again 2 months ago. I have some head position when I can see normal picture, but its causing muscle pain in my neck and back... :(
I can live with this, but would like to know whats causing it.
And then you mentioned anxiety... I was diagnosed F 40.0 or 9, not sure, week ago.