Keeping Faith -
I would go for a second opinion. Look for an MS specialist if you can. Even if this neurologist is an MS specialist find another. I think I went through 3 doctors (plus a Mayo clinic visit) before deciding the fourth one was the best - empathetic and skilled at the same time.
Also, has anyone suggested a spinal tap test? That will give useful info too.
Don't be afraid to switch doctors if you feel you aren't being heard or getting what you need. Be proactive. YOU know what's going in your body better than anyone else. If something feels wrong and you aren't getting help, find someone who can help you.
Good luck!

