Hey, well ive taken all my bc pills faithfully this month without missing any or anything, and I still have a late period. It was supposed to come yesterday (the first day of the green pills) and it isnt here yet today. I have been having semi/protected sex (we just use the pull-out method). He says he's never had any kind of pre-cum ever so we assume that to be a pretty reliable method with the birth control. Any ideas on why I could be late?