I had unprotected sex aug. 19 and some sperm landed in me. The 25 of Aug. i expierenced some very light bleeding which was only at the moment for a while, which was pinkish and some brownish spotting as well. I was sure it was implantation bleeding, thus i had been expierencing some sore breats and very little cramping, not really. Also headaches and have felt more tired than usual. I even felt wierd and had the feeling of being pregnant. I felt that i could sense it. Though i did not took a pregnancy test because my period was to come this 30th, so i'd rather my period tell me my final answer. So it did come last night, and i had bad cramps and started off with a low flow, usually my cramps only last a few hours the most, but up till right now, they haven't stopped and i feel tired and sick and with some mild pain. And now my flow is a bit more heavier but with many little chunks of blood. So i am wondering if it could be a Chemical pregnancy that im going through??