Anyone get pregnant using birth control?

Hey y'all! I'm kind of in a little dilemma here. Sooo I just started birth control this month. I decided to do a Sunday start. My last day of my period was Tuesday, 1/10/17. Then I took my first pill the following Sunday, 1/15/17. Well I had taken my 6th pill and then had unprotected sex and he came in me. To top it all off it was my estimated ovulation day! Soooo, question is, what are my chances of being pregnant? I know they say to wait 7 days before having unprotected sex so could I possibly still be covered even though it was only day 6? Thanks ladies 💕