I haven't had any nausea, symptoms, but I'm supposed to get my period Thursday, my back is hurting a little and it normally does during my period. I had sex twice but with a condom, and on day 4 of my period at the beginning of my cycle I was still bleeding but my boyfriend with a condom put it in me for a second maybe, he urinates before that. Could I be pregnant? Or about to start my period