I had sex 6 days after my period and the condom broke. He finished in me because we didn't realize it broke until we were done. I took plan b the next morning. A few weeks later I had some heavy bleeding for about 4 days, could this have been implantation bleeding?? Or was that a real period?? I haven't had my period yet and I'm scared that plan b didn't work! Please help, thank you (: