Burning & Tingling

I suffer from migraines and this week I have had one for three days. I went to the er on Wednesday because I could no longer take the pain & my normal meds were not working. Well I left the hospital feeling really no better than when I went in. While at work on Thursday my head began to feel cloudy, I got a tingling/burning sensation through my whole body and my heart beating much too rapid. I freaked out afraid that my WPW was presenting itself. I went to the hospital and all was ok on the ekg. I have since continued having this tingling in my chest, arms, hands, legs and head. I am really afraid, but the er says it's probally nothing. Please help....does it sound like anything to you? P.S. 4yrs ago I had a series of 4 seizures out of no where and I was diaginosed w/ Post-partum vasculatis. Please, please help!