Hi, I was just wondering what the chances are of having a heart attack at 20 years old. I'm an Obese female with heart disease on both sides of my family along with diabetes. I've been having discomfort in the center of my chest and down my left arm and sometimes in my back. I have also been having trouble sleeping for the passed couple of weeks. Maybe it is just anxiety? Or is it even likely to be worried about my heart at the age of 20?