3 weeks ago i had sex unprotected on the last day of my birth control pill pack. He pulled out but i was scared so the next day i used my pill pack as the morning after pill because it is one of the ones that can be used that way. after this occured i did not get my period until 5 days later. but i definitly got my period. so after it was over i started on my next birth control pill pack and i had sex about 4 days ago. i am about 7 days into the pill pack and just today i noticed a brown discharge when i wipe. im really freaked out and does this mean i could be pregnant?!?