2 years ago i had heart palpitations, i went the the hospital and had various tests over about 6 months, ecg, heart moniter, blood test, ultrasound and was told nothing wrong, apart from an innocent heart murmor, since then i can not stop thinking that there is somehting wrong with my heart, all day every day, i find my self listening to my heart all the time, i get funny feelings, like my arm feels funny, slight chest pains but this has been going on so long i dont knwo whether it is happening or its just me thinking its happening. i never used to be like this and need to knwo what i can do to reassure my self i am ok, its pontless goign to the docs they listen to my haert and say everyhting is ok, but its starts palpitating heavy when i lay down or i breath to heavily??