Hi, I'm 17, I've Been Having This Chest Pain Since

Hi, I'm 17, I've been having this chest pain since I was 14. I thought it was nothing until it keeps happening daily in my life right now. It's been bothering me and giving me pain all the time. It usually comes whenever, but I don't know what it means. Is it caused by stress or am I about to have a heart attack? I don't know if I should see a doctor about it because I'm really in good health an everything is fine about me. But, it's this chest pain that worries me. Please, I need an answer.