It started yesterday evening. I have this burning pain in my upper abdomen and chest that runs up along my shoulder. I have this pain for 2 or 3 minutes then it goes away for a couple of minutes then comes back. No matter what position I sit/lay in it won't stop. Now I'm going on 17. Am I too young to have gallstones? I've recently lost 15 pounds in the past two months of just pure healthy eating and exercise. Does it sound like I have gallstones? My mom and dad think it's gas. I don't want to sound dramatic, but this is not gas. Any idea? Thanks