I am supposed to get my next period Sept 1st. I had unprotected sex while i was ovulating. On August 17th my husband came inside me. 6 days after having unprotected sex I started to bleed dark brown blood. August 23rd is when it started and it is still happening today August 29th it started out very light bleeding light enough for a pantyliner .. today it is a bit more dark brown blood but still not nearly enough to compare with my periods. the blood is also brown/black w/ a almost sticky substance. I had no cramps which is almost impossible if this were a period because cramps is one thing i do not and can not miss!!! when i do have cramps due to AF they are so strong i cry. August 22nd I had the runs and i have been completely constipated ever since. please help i do not know what this could be. Maybe implantation bleeding? but i have been bleeding for about 6 days now. I am stressed out thinking maybe the egg just didn't implant right. am i miscarrying??! I took a cheap pregnancy test a few days ago just for the sake but of course it came back negative for it is too early for them to detect anything. my period is supposed to start in 3 days and i have never experienced anything like this. I have never spotted days before my period when it comes its here. Any Ideas??? Please Help!!