My partner and I had sex last Friday and my period was due the following Tuesday. I've been on the pill and by Tuesday I still hadn't gotten my period. By Thursday (3rd red pill) I had slight cramps and light bleeding which stopped after about an hour, the Friday the same thing happened but the bleeding was bit darker but also stopped after awhile. I took a pregnany test the saturday afternoon and it came back negative. Shortly after I got cramps again and was bleeding a bit more heavier with dark clots and even black bits in as well as a little bit of discharge. The cramps remained. I am a bit worried, I have been suffering from stress and depression lately as well. Could this be the reason for this? What else could it be? Please help!