Has your doctor prescribed a course of IV steroids to at least help to allay the symptoms you are suffering at this time?
Even if he/she isn't willing to say MS, the least the doc should do is actually TREAT the symptoms! You may find that steroids will help.
I'm sorry to hear that it is so hard for you to get a diagnosis. You'll hear lots of voices here with the same story. Good luck and let us know how it goes!