I don't have double vision, but I do have an issue with feeling "off balance" when I drive. I'm sure I'm off balance at other times, but I don't feel it as acutely as when I'm driving.
I don't know why this is and I have not found a doctor to explain it to me. I did have a person from one of my support groups send me a link to a similar condition and it was neurological (not inner ear). So after all these years I chalk it up to that.

P.S. If your docs say you can not work, file for disability asap. Get that ball rolling because it takes a long time after acceptance to get Medicare. If you can not work perhaps your State has a program to help you short term....you may get some help with medical too. Check into it.....and most of all......DON'T PANIC! My first bout of MS issues was frightening but it got better.