Hi MDL and welcome to the group!

Sorry you have to be here, but it's a great place for info, support and genuine caring. I suppose at this point your symptoms could point to many things, but hang in there and keep reading and possibly seeing a new doctor. Some here took years to get their "official" diagnosis. For me, after optic neuritis twice, fourteen years went by before more symptoms appeared and I was diagnosed as "probable MS". Now thirty-six years later, I'm secondary progressive, but everyone's disease course is different.
When my ms started advancing, my toes would do what you describe. As time has passed, those "cramps" have turned into spasticity throughout my whole body......Ouchers! Just my experience. Take care and good luck. Stick around and let us know how you make out........