@carole-ann_scott, if you have a diagnosis of MS then you need to be on treatment (if you want a disease modifying drug that is) surely then the question about a relapse or not is beside the point. Why doesn’t he want to treat your MS?
AND, clearly its a relapse from what you describe.
Is your neurologist even a MS specialist ? Doesn’t sound like it, sounds like he was talking a load of tosh; or maybe he was having a bad day. I’d take a deep breathe and go back via one of the nurses and state that you want you disease treated.
…just my opinion