I am 18 years old and I have pain in both of my breast, and im not sure what could be wrong, They hurt to the touch and I cant sleep on them (i sleep on my stomach), underneath them especially hurt and i cant press on them as well, and when I take off my bra at the end of the day or in the middle of the day they hurt even worst than they did when they were in the bra, I know my period is not coming, and I am on birth control pills, Does anyone have an idea of what could be wrong? Could it be a side effect to the pill? Or could it be something else? Or could it be cancer?I also have not been having an appetite, I have only been eating one thing a day and a bottle of water, If i try to eat anyhting else I feel sick, and I have lost 5 pounds.