I took Ritalin for a few years back when. I started having chest pains. They were going to continue me on the ritalin but with Inderal which is a heart medication. I discondinued both. What I'm trying to say is you most likely are having a side effect from adderal but I don't think it's permanent damage. You should be honest with your doctor. Maybe you are just in a panic because what you think you caused heart damage. I don't think heart damage would happen over one time of taking a few. I would check with your doctor.