My heart will start to beat really fast and it will feel like when i breath it is inhaled through a filter. at times i fell hot, but not really if that makes sense at all. sometimes i get pain that isn t a constant. sometimes its just in the chest. sometimes its through the neck also. sometimes the pain is feeling like sinus pain as well. and sometimes my whole body. i can move freely and rarely get to the point where i feel like shouldn t move. In a sense to me it sounds like a heart attack, but i have had this problem randomly (maybe 3-5 times a year) its a god aweful feeling. i can remember first experiencing this when i was about 8 or 10 (earliest memory of it) just walking outside. other times its after a bike ride, running, or just doing daily things. its not always an active attack, it does happen when im not doing anything at all too.