I constantly have chest pains, arm pains, stomache pains, headaches, lightheadedness, tightness in my throat, I am very stressed, and I am constantly thinking that I have a heart problem, I check my pulse constantly, sometimes without realizing. I usually get chest pains and other pains during rest, and very rarely during physical activity, even if it's really intense. I've had a panic attack once in the past because the chest pains were severe and I was terrified. I'm only 15 so I can't figure out what it was, I went to the doctor, told them all my symptoms, and they didn't even sound concerned, but I talked to my dad and he said some of the symptoms are similiar to what he had when he had a heart attack, other symptoms I told him he said he had no idea what they'd be from. Also I find myself reading up on heart conditions on the internet, and then as soon as I get the slightest bit of one of the symptoms, I obsess about it and it becomes worse. If anyone could help me figure out if what I have is just anxiety, or if I should be more concerned I'd be very appreciative, thanks.