Im 13 and I want to know if I have heart disease . I already been to the docter,but I just need my blood test . Sometimes when I breath my heart or chest hurt a little bit, I have shortness of breath sometimes, my neck has this sharp pains and my back/shoulders hurt sometimes. About 3 days ago I was eating and my rubcage starting hurting, arm, shoulder. I am really scared. I dont get dizzy, and I don t faint, but I do go to the bathroom a lot.