I just spent three days in the hospital thinking I had maybe a small heart attack. They threw every cardiac test in the book at me, including a cardiac cath. (Apparantly, those of us that are "blessed in the chest" have the added bonus of having breast tissue press against the chest wall during a nuclear stress test and it looks like a heart blockage, thus winning you a cardiac catheterization so that they can confirm that there is nothing wrong.) They told me that my heart is healthy and are pinning this down to a major anxiety attack, but let me tell you, that sure as hell isn't what it felt like.
I've never had one before. It woke me up out of a deep sleep, it scared the crap outta me, and I don't care to ever have another one, please and thank you.