Ok so sometimes, my heart just hurts. It feels like its doing flips, or being squished or stabbed everytime i breath. It normally lasts from a few seconds to a few minutes. I ve had this since i was like 7 and it just happens randomly, but not that often. A month ago it hurt all day, especially when i laughed, sneezed or took a deep breath. I don t know what it is, and im only 14. I ve never seen a doctor about it. What could it be? Should i be concerned. It hasnt happened recently.