I'm a 19 year old female and I have had pain in my chest off and on for about 6-7 years. It used to come on for a few days and then go away for 5 or 6months before it would hit agian. This last year has been much more often though. It's not like heartburn. I get that and i know what it feels like and antacids do nothing to help. If i apply pressure with my hand it feels better. I noticed sometimes it would be brought on by stress but then sometimes i would just be sitting in class and it would start. It doesn't follow eating or exercise. Asprin used to help, but I've been taking it this time around and it hasn't been doing anything to help. What could be causing this?