Hello, okay...so I have had sore breasts going on for a month now, and I am not quite sure what is causing it. At first, I thought it was the Progesterone I was taking to regulate my periods, since I have been diagnosed with PCOS. Then, I thought okay, I started my period, that, that could be the cause of the tenderness. But the whole time, I have been off of my period, my breasts have been sore EVERWHERE! I don't know if it could be the birth control I'm on, or I'm pregnant, or what? Please help!!!!