I have been on my birth control for about 2 years now, but I never knew I was supposed to take it at the same time every day. I have an irregular period an my cycle is about 39 days. This past Saturday and Sunday me and my boyfriend had unprotected sex, but he pulled out both times. I then used the ovulation calculator and come to find out I was the most fertile that day. I also realized I hadn't taken my birth control in 4 days including the 2 days I had sex.. Could I be pregnant?