I was sat in my friends house about 2 month ago, was watching telly with a few mates and all of a sudden my heart was started going so fast, it felt like it was going to jump out my chest. i was shaking really bad and i had to go home because it felt like i was going to have heart attack. i had to sit down and carm down and try relax. it finally went but i was shook up really bad! it has not happened for a few week. then a few week later i was on the pc playing a game with a friend and he was beating me, i felt a bit tense that he was winning and then from no were my heart started again! was the same as what i had at my friend house were my heart was going so fast it felt like i was going to have heart attack. so i had to turn everything off and sit there till i got relaxed and my heart slowed down. it has happened once more since when i was out at a mates and they said it wasn't normal. they thought i was having a panic attack. now its not happened since.. but i keep getting like heart burn, it comes and goes and its only there for a few seconds but its sore! been waking up with it during the night! do you no what this is? do you think its time to go see doctor.