I recently been in and out of er and doc. With rapid heart rate and shaking and hot flashes. They did a ekg which was normal and a ct and x ray which was fine. So the er gave me xanax 1mg. But now if I don't take the xanax I become very light headed and then when I take it I'm back to normal self. Am I dying is somthing Wrong with me??? I just wanna cry I'm 22 btw.