For the past couple months I've been having these symptoms, and I am not on any other medications. I get really light headed for no reason, out of it, then my heat picks up. Sometimes, when my heartbeat picks up it starts to heart a little and just throbs. I've had my blood pressure checked during one of these episodes, and nothing it turns out normal. Which makes no sense, since its throbbing, and hurts. During these events too, my tongue kind of swells up, not a lot though, but still enough to make it a little difficult to talk. If anyone can give me any sort of information on what could be happening, I would be so happy!