Are you sure you don't have diabetes? It is possible that you may have contracted juvenile diabetes. Is your urine really sweet smelling? Strongly acid? You should get to the doctor for a checkup. It might also be a heart attack, not unheard of in athletes of all ages. It could be many things, honey, but don't delay if you feel at all worse, get to the hospital immediately. Tell them you think you are having a heart attack and they will take care of you right away. Many things come to mind, such as rheumatic fever, dengue fever, etc. Please don't waste time on this. It may be something simple, but it may also be something major. Your health is too important to play with. I had a friend who played soccer 6 times a week and coached other times. He had a bad stomach pain that would not go away. Went to see his doctor and the doc put him on some medicine, which was useless. Finally, after a week in the hospital, someone finally did a blood test and it was a heart attack! He had a bypass immediately, and almost died. Take care of yourself. Ennui is not a laughing matter.