Squeezing pain in my chest?!

above the right breast, it's always in the same place. It feels like one of my arteries or veins are being squeezed, and it always happens in the same place. Also, it happens when I'm at rest, and nothing stressful is happening. I'm only 17 and my family has had a rather healthy history. I think my grandma had heart problems though. I'm not too active, but I eat healthy (although not as much), I also get palpitations in my heart sometimes and it makes me lose my breath. What can I have? I've done some research and 'Angina' seems like the nearest thing to whatever is going on. Help please