I had intercourse 2 days ago and i'm on oral birth control. two days later i started taking antibiotic. can i get pregnant?

Can I be Pregnant?: Nope. Not likely. Not impossible, but not likely. Keep taking your birth control and while on an antibiotic please use condoms or other barrier protection.

Very possible: Antibiotics may interfere with the ability of the birth control medicines to work. Sperm in the ejaculate can remain viable for a few days. Hopefully you did not get pregnant if you weren't planning on it. Birth control pills also keep your menstrual cycle regular, so if you are late take a test. Avoid further intercourse unless your partner wears a condom while still taking the antibiotics.