Hi Turner.

The old saying goes..that if they can't find anything else, it's MS. There are lots of PwMS, who have had clear MRIs and Clear LPs.
When you have "crashes", what are your symptoms? Numbness, paralisis, tingling, double vision, extreme weakness, vertigo, fever..etc?
Hang in there, Patricia. Lots of people are waiting for a definate DX, even though, they have a lot of the symtoms of MS, there really isn't
one test that will prove it.
I'm glad that your Neuro or PCP is, at least, treating your symptoms. There are many helpful meds out there for symptom relief. Don't be afraid to ask for them, while he/she is making up their minds about your DX.
Good luck and let us know how it's going, OK.