... heart will suddenly hurt, like there is something squeezing it or something, then suddenly it's so hard for me to breath. I don't want to tell my parents yet, I just want at least a clue what is this that I'm feeling . Also, most of the time, this happens when I'm really sad. Like when I'm heart broken, also when I get too excited. I weighed normal. I'm only 14. And I do exercise, so I don't think it's because of too much fat