I am a 20 year old male with an average build and 6 3. Today when I was bowling my heart started to pound really really hard. So hard hurt really bad and took a lot of focus to get away from the pain and slow it back down. Its not the first time its happened at bowling. Sometimes it happens even when im not at bowling and doing other things. Is this a heart issue that should be checked out? or is it just simply a phsycological thing when i feel pressured, excited, or any extreme feelings (even though i think it has happened not under these conditions as well). Also i was wondering if it would be wise to get a blood test done. To check cholestorol and stuff to make sure im eating right. If I get one where do I go and what does it tell me ?