...I Soooo Agree with you..!!!! ... Please contact a different Doc... I am sure the one you have is good...Yet WHY NOT DO THE Spinal Tap..??? ..I Dont get it.!!
My doc is the one that said I had to get one....I did NOT want one cause - really- who wants a needle in their back...

Not ME.!!
Many say they dont hurt...But the local they gave me Hurt like Hell.
I think it's ok to start the meds like the doc is saying...but Gezzzzz one should Not have to ask / beg for a spinal tap..!!?? Is this Doc a MS specialist ?? are you at a MS clinic.?