Help!! I'm 16 and having a lot of pain with left rib cage. It sticks out some more than my right one too. Over the past 6 months or so I've had a lot of problems with sports or any kind of excercise because I would get shortness or breathe, heartburn, and my heart rate wouldn't go down for at least 45 minutes after excercising. Only recently have I had sharp pains and a constant dull soreness on my left side. Occasionally (about 3 or 4 times a day) it feels like something moves in front of my rib and it causes me to not be able to breathe like normal with an extreme sharp pain... Any ideas on what is happening?????