I had sex September 4,11,23,27 ,it was unprotected and he came in me several time. My period was the 22-26 , the day after my period ended I had sore breast and nipples and they still are sore, then I started cramping. I had a little bit of blood in my undwear yesterday, I have heartburn ans nausea sometimes. I was fertile the 5-11 of September and my next period is October 28. Am I pregnant?