I take my birth control at the exact same time everyday and my boyfriend always uses a condom. I got my period a day late this month, but when I got it, it was full-on that morning and daytime, but I am not bleeding anymore. What are the chances that it is from pregnancy? We are safe every time and I religiously take birth control and we do not really have sex that much. I know about implantation bleeding, but this was not spotting, it was exactly like my regular period, but for one day. I still have cramps. Could stress be a factor here? I stress out all the time and I also have anemia if this helps for any possible answer. Thanks!