Hello, I had unprotected sex on oct. 17th, but friday b4 that I missed my b/c pills and I was put on antibotics i've heard that they can mess up your pills I was on anti. For a week takin 2 pills a day. If I wasnt on tha pill my ovulation day would have been on the 18th. Since then i've been having some pregnancy symptoms such as: sleeping more, eating more, peeing very often, i've been feeling sick to my stomach the past few days, very sore breast, headaches etc. Well my period is due on nov. 1st but now its oct. 31st and I woke up this morning to pee. After I wiped myself I saw blood on the tissue. I've been having cramps on the left side of my abdomen since tha 30th. I ususally dont cramp until that day im suppose to start my period. And my period is never early. Can somebody tell me whats happening?