You were absolutely right to fire this doctor. he didn't put your concerns and pain on his radar at all. These doctors who dismiss us a patiens have gotten too big a head.
I do not have MS, but other neruo problems, I also fired my doctor, I actually waved bye bye without a word and walked out. I was to say the least as ticked as you were. Report him. He forgot his vows to "Do No Harm" ginnie