I missed 2 birth control pills back to back right before ovulation and had unprotected sex and got sperm in. chances of pregnancy?

Significant chances: Between the timing in your cycle and the missed pills, there is certainly a chance of pregnancy. You should take a pregnancy test, at home or in your local medical facility. A urine test typically can be positive after a week (since the unprotected sex) and a blood pregnancy test can be positive after 3 days. It would be wise to abstain from sex until you know your pregnancy status for sure.