I had unprotected sex a week before my period , i was suppossed to get my period on october 15th but i didnt get it. But on november 7th i didnt know if it was my period or what but it only lasted for three days and the blood was really light and it wasnt heavy at all. My actual period was suppossed to start on November 15th but it didnt . I'm really confused about this am i pregnant or not ?