I don t want to worry my mom so I have been giving this a week now to past but its not. I am 17 and I want to say its from not getting enough sleep but I am getting at least 6 hours on nights I stay up late. Regularly I get at least 8 hour sleep every night. I don t have a job this summer so I am home a lot doing nothing. Just sitting my heart starts beating really fast out of no where probably about 5 times in a row then it will slow down again. I have a irregular heart beat and I know what it feels like. This beating is much harder and faster and leaves a funny feeling. Can you tell me what I can do to improve this before telling my mother? Sorry if I put this in the wrong category. No I am active I go running everyday, I go swimming on the weekends. I have a super fast metabolism that won t let me keep weight on so I have to eat a lot.