I had unprotected sex & my bf ejaculated in me. im pretty sure i was ovulating. i took plan be at about 48 hours. i was supposed to start the 16th.

Should be OK... : Most likely you are NOT pregnant ! Plan B is recommended ASAP up to 72 hours after unprotected intercourse. Sometimes it can delay period since it is high dose of hormonal pills. I recommend await a week and if no period occurs than check pregnancy test . Talk to your MD if any further concerns. Remember to discuss with your doc other options of contraception!