well i am 19 year old female and athletic. i do cheerleading but after i run i get severe stomach pains that last from 5 to 15 minutes. The pain is so bad that i cant sit still. It occurs in my lower stomach. It didnt happen that often before, it only occured from time to time, but now its getting to the point where it happens everyday immediately after i run. At first i thought it was because i didnt eat, or i didnt eat the right things, but i tried everything. I tried not eating, eating, eating more carbohydrates, because that's what my doctor recommended, but nothing works. I dont know what to do and i dont know whats wrong with my stomach. HELP!