Being able to walk is kind of a big deal. Falling is a really big deal as you could potential hurt yourself.
Since it is Friday, I would call the neuro's office and at least let them know what has been going on. You may just be experiencing a pseudoexacerbation as you just had a virus. However, it is always best to get it checked out or, at least, find out what you are to do should things get worse over the weekend.
Good luck, Erin. I hope you feel better soon. Let us know how you are feeling.