I too was given the dx of migraines and told I was just "anxious" given a xanax and sent home. I was dragging a leg, and off balance. If you truly feel that MS may be in the picture, please find an MS clinic, not just an MS MD, find a CLINIC, and set an appointment to rule it out. Please expect that they will want an MRI and spinal tap. They will do a full run of blood tests from B12 levels to Lyme disease. B12 def can mimic MS. Lyme can mimic MS. MS is the great pretender. No two patients express the same symptoms in the same way. It is clear you feel you are receiving dismissive care, and should seek a new MD.
I hope you feel better.