I started taking birth control 10 days ago and had decided to have sex on the 8th day I had been taking it. He wore a condom and pulled out but ejaculated on my lower back/ butt. We are 99% positive nothing traveled down but 2 days after having sex I experienced slight blood when I wiped. I'm a little worried and have no clue what this is!! I have 14 pills left until I have to take my sugar pills.