Does anyone have any idea why I'm having chest and heart pains? I'm only 21 and I'm not overweight but when I breathe in, I'm having sharp pains in my heart and armpit. I'm kind of scared because my moms side of the family has heart issues. She has a heart murmur, my great grandpa died of a heart attack and my great grandma died of A-fib. The only thing I was doing before it started to happen was looking at funny pictures of chihuahuas on google lol