I am on birth control and take it almost perfectly with the exception of taking my pill a couple hours late every now and then. But I also take antibiotics for acne and I worry it increases my chances of getting pregnant. I also do not get my period on the placebo week I get it on the third week of a 28 day pill pack. I'm Worried I still may ovulate so my boyfriend and I use condoms. Yesterday the condom broke and he may have finished inside of me and we are extremely worried. I am considering using plan B but I hear it is very bad for you and messes with your system and hormones and makes things difficult in the future. I am still really worried about getting pregnant and can use any advice. I definitely can not get pregnant right now.