I started my period last weekend on Saturday 2/22/14 and then it stop then on the night my period stop , I had unprotected sex but he pulled out before he came ,then in the middle of the night I started to bleed , so I put a pad back on and a lil blood was in there when I woke up , now I only see a lot of blood when I wipe but I see lil blood on my pad every time I where now . Is it possible that I'm preg???