Ok, well lets see. my boyfriend and I had a condom slip off during sex and it happened about 10 days before my period started and we had unprotected sex about 4 days before i was due to start. i'm not on bc and my period is very different than normal. It was very light and on the whole only lasted 48hrs with 12hrs where i stopped inbetween. Also the blood itself was almost dark brown of old blood and seemed kinda mucusy. I haven't ever experienced this type of thing before. I've had many other symptoms that would indicate pregnancy including moodswings. I've also been nauseaous and when i wake up my stomache is very upset until i put food in it. I usually bleed for 4-5days but i've only bled for 2 this month. my breasts are very sore and i'm tired all the time. I have also taken 2 tests and both came back neg. This scares me because I got tested with my three yr old and it came back neg and i went in a month later to the same clinic and got tested again and it came back positive. I feel like i'm pregnant but I don't know because of the tests and the bleeding. it's not like with my other 2 children. any feedback would help. Oh i'm 27 and usually run on a 21 day cycle. though last month it was 28.