Welcome VS, nice to meet you. I don't know why some Neuros take
soooo long in DXing or ruling out, MS and some do it more quickly?
It is true that in the early cases of MS, it doesn't show up on MRIs
and LPs, but eventually does.

Some Neuros/Docs also like to DX you with a case of anxiety/stress,
if they don't see anything on the tests. A nice way of saying, "it's
all in your head.... I'd love to tell that Doc, "It's obviously neuro
-logical, so of course it's all in my head and spine, you just haven't
found it yet".

Go to an MS specialist Doc/Clinic and Get a 2nd opinion!! Let us
know how it goes for you.