I agree -- it's pretty hard to top nerve pain! Having been diagnosed with fibromyalgia, the pain doesn't seem to fit the description. Not so much the muscles, but the nerves. I have it all over my body, different areas at a time, however I've had a literal "pain in the butt" for 13 years non-stop. It sure wears you down after awhile. The only med I found that really helps is Carbamazipine (sp?), generic for Tegretol. The only trouble with that is it puts me to sleep so I don't like to take it often.
Hopefully you can get a handle on your pain before the MS symptoms advance, if they do. Being in a wheelchair now, the added pressure on my "bottom" is making things worse. Good luck with your new neuro!