I attempted 6 months ago and since then I get panick attack like symptomps, I have a realy heavy feeling when I walk and my heart hurts. It feels like I keep reliving the OD, and I'm worried. When I went to the heart doctor there was a guy who described the same symptoms, the docs said he was fine, and he had a heart attack, a week later. When I do heavy physical exertion I get sick, right away, as if my heart can't take it, and since the docs couldn't find anything my question is does anybody get panick attacks after heavy physical exertion? I have been to all kinds of doctors so that's why I'm thinking it's a panick attack, or I have minor heart damage that the machines don't show. I was in top shape before the od, and now I get sick when I exercise. I just hope it's panick.