Since you're posting here, is your unasked question, "Is this MS?"
It doesn't sound much like MS to me, but indeed something heart related, or vascular, or epilepsy, or stroke. You say you've seen specialists -- what specialists? What have they suggested? What tests have you had run?
Sometimes you need to settle on ONE doctor, and keep going back to him/her with new episodes, or new problems, so that he can see a pattern over time, of what might be happening. If in fact you had a TIA (or have had several of them), that would require you seeing a heart specialist, and be on medication to deal with those.
Give us more information, and maybe we can direct you to something more appropriate.