Sorry to hear about everything you're going through. The DX process can be long and frustrating.

My VEPs were normal, and my LP was inconclusive during the DX process - So they looked for everything under the sun that this could've been. My brain leisons are very typical of MS (Dawson's Finger Effect) and I have three MS plaques in my spine, but they still did a lot of testing to rule out the mimics. I had about 12 bloodtests.

In the end, with everything else ruled out, It took back to back flares to DX me. Changes between three brain MRIs and Changes in my clinical exams within a year's timeframe (Went from 4 leisons to 6 to finally 9).

Hang in there! Hoping you find the answers you need soon.