For some reason I have been having a very fast heartbeat when sitting down or lying down and relaxing.It happened earlier today. I was watching TV and my heart just started beating rapidly and it was also very strong. I could see it beating through my shirt. I am very healthy and do lots of running. I am a 13 year old female. I haven't told my parents about this yet. Also I have never drunk a fizzy drink in my life. Could someone please help?
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i think its best if you told your parents and ask the doctor. it could be heart burn? im not sure
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