I've been on the birth control pill for about a year, I take the pills at the same time everyday. I had unprotected sex on the Saturday of the second week on the pack but i also had some brown color in my discharge, but not much. Sunday- about friday i had a period/ breakthrough bleeding (it happens alot *sometimes early as the sunday of the second week*) and this was the week right before my placebo pills. I'm into the second pill of the week and theres not sign of a period. I dont have nausea, feel sick, or am tired, and i dont have to pee often, also my breasts are not sore what so ever. I did take a pregnancy test today (not in the morning) and it said negative. Is there any chance that i could be pregnant?