Hi im 19...Male skinny very Active but heart issues have been apart of my family. I have very sharp pains sometimes when i breath on my left side, the doctors say its normal it may be gas or sometimes it just hurts. But as of late when ibreath like my whole left side would have that sharp pain. Everytime i have these pains i get worried, cause at this day and age you could be my age and have a heart attack ..what test can i go for to check up on my heart and make sure its in good condition. My other question is how do you specifically know if your having a heart attack? Thank you