I just had my little girl in July and it is October now. I went through the six weeks of bleeding and then after that I had sex with my boyfriend and it was unprotected. He said nothing happened that night but about 6 days after i had a very light bleeding for about four days. And about 3 weeks later i had a very heavy period that lasted 5 days and it was very heavy. My urine is very dark. I have been taking birth control pills and ive taken about 4 to 5 at a time a couple of times to prevent it. Could i still be pregnant?