I have been on birth control pill for over 2 months now, im wondering if i may be pregnant because while me and my boyfriend has sex he came in me?

Low risk: If you are taking your pill reliably, the chance of pregnancy is low, but not zero. If you ever miss a period, take a pregnancy test.

Unlikely: If you're taking the pill daily without missing any, the changes of pregnancy are small (<1%); however, in typical use, women often miss pills, and the failure rate goes up. If you forget pills, you should discuss another option for pregnancy prevention.