definitely see a neuro soon - hopefully a good one - maybe one associated with Emory if you can.
MS, MG, something else, I have no idea, you'll have to have more tests unfortunately. Make sure they check B-12 too.
The awful heat wave this summer could have made things worse, so you might feel a bit better soon now that it's cooling off some.
Not knowing what's wrong is so hard, I've been there.
Hang in there - best of luck.