Hi Julie~ I also went and reread your other thread. I guess I kind of agree w/holly on this. It sounds like your Neuro is at a point where he can't DX you, but wants to keep your file open.
As several have said, it may be a good idea to see an MS specialist or at least a diff Neuro. A 2nd opinion may make you feel better. Wish I could help more, but it sounds like your Dr is at a crossroads and can't put his finger on a dx right now.
We are here for ya, as know it's frustrating. Hope you feel better soon.
take care and don't forget that ~~ we care.