My Boyfriend And I Had Sex A Week Ago. I'm

My boyfriend and I had sex a week ago. I'm not on birth control. He went in once with no condom and then put one on and finished inside me. He cleaned up and we waited a bit and then he put the tip in me before putting on another condom and finishing again. We had sex last night as well and used a condom and he finished inside again. My lower abdomen has been cramping and been upset. Could this be pregnancy?