stopping the pill & getting pregnant

Hi, I stopped my birth control & had a 5 day legitimate period. I'm currently on CD 11. My bf and I had unprotected sex cycle days 5-9 & 12.

I have been using opk to detect ovulation and have yet to see a positive one, but l'm not losing hope. & just purchased a bbt thermometer. Is there still a chance I could get pregnant this cycle?? TIA