I am 16, and I havent been sexually active for a year. Everytime I have my period I have light cramping the week before. When I am on my period, I have a heavy flow and severe cramps for the first 3 days. My cramps are so bad I am in tears. I can't stand up and I tend to vomit. The bleeding is so bad that I have to continue to change my tampon every 30minutes to an hour, and I use super size. The cramping is bad, even after I have taken medicine. All I drink is water when I am on my period. I never seem to have an appetite the first few days either. It has been like this for about two years now and it seems like each time it gets worse. What can I do and is there anything wrong with me?