its not a heart attack
..so dont freak out..but you do need to go to your doctor b/c there is always a possibility that you could have somethin wrong with your heart...i just had my heart checked out a few months ago b/c of palpitations and chest pain
..mine was all due to anxiety
..so have you been feeling anxious or anything like that? that can really do it to you..but since you have had it for three years i dont know..its probably not even a big deal...it could be acid reflux
..do you see how scared you are ? i promise you..if you go to the doctor and get it checked out you will feel so much better!..and also worryin about it isnt helpin it none!