I had unprotected sex a week and four days ago, my period is due in 4 days from now and just as i've gone to bed i've noticed im bleeding. I'm always on time!! I've moved away from the guy i was with (sudden unexpected circumstances that happened the next day) Can i have some suggestions as to why this might have happened? Is it a common sign of pregnancy, or could it be due to the fact i hadn't had sex in a while? I just want to know the most likely reason so i can sleep better haha!