Dull Heart Ache Small Ache In Heart Area. What Could Cause It?

Small ache in heart area. What could cause it? - dull heart ache

I had this dull ache in my heart as a small area in the left breast. It hurts the whole day for some reason. It began as a month ago just for a day. So now a month later I received another and the 3rd Day in a row sorry. I am relatively healthy, trained, I'm only 19 and I eat very healthy, so I do not know if it could be a problem with the heart. Everyone on my father's side, the family has occurred mitral valve, so I'm not sure if this could be the same. Can someone tell me if this sounds serious, or as a matter of your heart? Thanks