It sounds alot like me! Dont wory at all though. It sounds like you may have experienced a panic attack. How old are you. I am twenty years old and panic attacks usually occur from 20-30 years old. When you had your palps, did it feel like you couldnt catch your breath? Any way, you might consider getting a treadmill test to rule out any heart problems. Believe me, when I had my first panic attack, all I could think was that I was going to die of a heart attack or some other weird heart problem. If you do have anxiety attacks, you could take meds like antidepressants or get psychiatric help to get you through them. Just know that it is not life threatening to have panic attacks and it will help calm you. Xanax works very well to stop a panic attack when you feel that you are about to get one.