I think I have a heart condition.

I know I have no right to self-diagnos myself. I'm not. But I just think I might have one. Because, before when I run even for just a while. My heart hurts. Not too long, but it hurts. And a while ago I jogged. Everytime I run I stop, because my heart is hurting. So 70% of my running is really walking. Because my heart can't take it..

I don't know what to do.