I missed almost a week of birth control pills. During the time that I missed the pills, I was having unprotected sex and letting him go in me. We started having sex on Monday and then on the following monday, I began to bleed heavily. It was a bright red and with absolutely no clots. Could this have been withdrawal bleeding? I bled for three days, all bright red and then it abrubtly stopped. Does this mean that I am absolutely not pregnant? And could I have ovulated after missing so many pills considering I only took 2 pills in one whole week?