Hi Raz, and a big Welcome to you. I'm glad you found us and so sorry for not seeing this sooner.
Some have answered your questions very well and I have nothing to add except to say that I was Dxed in the 70s with just a myelogram(sp).
I hope your Neuro can come up with some definative answers for you and I, too, hope it's not MS.....but nothing worse, either.