My Menstrual Came On September 11. Once It Went Off

My menstrual came on September 11. Once it went off me and my boyfriend had unprotected sex almost every other day. As time went on I started having cravings and eating alot more than usual. Two weeks before my normal menstrual was due I started having bad cramps but not menstrual like cramps. I was surprised October 7 when it came on again. It only lasted about three or four days. On October 12 we had unprotected sex again and that night I noticed I was spotting. Today is the 15 and I am no longer spotting. It stopped yesterday. Is it possible that I am pregnant?