What Causes Pain And Bleeding Of Breasts After Having Unsafe Sex?

Hi, I had unprotected sex but it wasn't for long before i realized what I was doing and made him pull out. The worst part is that it lasted two more times. Both pulled out within seconds. I became worried and took the plan b pill. The next day my breasts started to hurt and then I bled for 3 days. But my breasts still hurt and I can feel hard lumps inside of them. I took two pregnancy tests that read negative, but my period doesn't come till 7 more days.