i get that all the time im 17 ..
i hace it in tha middle of the day or morning for no reason chest pin shakking fluttered heartbeats i think im diein all the time

It is most likely anxiety. what you're experiencing is a mild panic attack. If you saw a regular doctor, talk to him about it again. It is possible for one to have a heart attack at a young age, but also extremely rare and if you saw a doctor regularly when younger, it would have been detected. You have age on your side as well.

My 16 year old son had the exact sypmtoms your describing. He was just diagnosed last week with SVT's (supraventricular tachycardia). His doctor did an EKG and everything looked fine too. He then had him wear a holter monitor for 24 hours and it picked up the SVT's. He just started taking Atenol for it, we'll hope it helps. Perhaps you should ask your doctor for a holter monitor as well.

i am 17 years old, ive noticed some weirdness with my hear for about a month or 2, recently in the past 2 weeks its been getting bad,ive been to the E.R twice in the past 5 days, i get this weird fluttering feeling in my heart, followed by an extremely extremely extremely fast heartbeat, starting to get pains in my heart/chest which are unbearable. the fast heartbeat usually subsides in about 5 minutes, but its so intense and fast me worrying when it happends makes it alot worse i think. im pretty scared its getting worse ad i dont see how much worse it can get, this has been effecting mmy life all i do is sit in because im scared to do anything to make it worse, it happends when im doigng nothing at all, sitting down laying down walking etc, if you have any information or tips on how i can help this or if youve felt these symptoms nand have been diagnoed please please let me know thank you!