I've been to the ER 3 times for my heart, and the doctors have sent me home because they can't find anything wrong. I went to the ER because I had severe chest pain, dizziness, trouble breathing, heart murmur, lose of vision, headache, and very weary. They did EKG's but never found anything and Xrays and CT scans, and never found anything. They've given me a 30day monitor, but the results weren't clear, and a stress test, and I did fine. Now, I randomly get really bad chest pain where I just bend over and grab my chest and I usually can't breathe. I also have weird heart beats, where I like can't breathe at all for a short second and my heart like feels like it stops. I'm only 15. I need help on some idea of what's wrong, since the doctors have no idea. Help.?