I'm almost positive that stress is playing a part in it, but I can't do much about it. I can't quit work or school. I need to graduate to go to college, and I need to save money FOR college. And for a car too, but Eh. And I don't exercise like my doctor suggests (maintaining an elevated heart rate the entire time), but I do manage to walk about 4 or 5 miles a day, according to my iPhone's pedometer. I talked to a cardiologist who came to work yesterday (I work as a bagger for a grocery store) and he actually said that what was important was to just use muscles, not to do cardio exercise necessarily. But I can't exercise well. I did a stress test, and within 5 minutes, I was ready to pass out and my heart rate was over 200 BPM. It used to hover around 110 resting, but the Inderal I take has lowered it to about 80ish. But I don't have the endurance to maintain my heart rate.