I keep getting sharp dull pains in both breasts near my arm pit. what could this be had it for a couple of months now?

Hormonal changes: At your age, the most likely cause is cyclical hormonal changes related to ovulation and menstrual cycle. It is very normal to notice some breast pain. I recommend using primrose oil at night before bed. Try to avoid caffeine. There are other remedies to try. If there is a family history of breast disease or cancer, bring this to the attention of your Physician.