Hi. I had unprotected sex on monday, 2 days ago. I am due to get my period sometime this week, most likely in two or 3 days. The sex was brief and he did not finish inside me. we then used a condom and proceeded to have sex. it has been a while since intercourse like that. I have been getting odd abdominal cramps, along with sore breasts (usual pms) and a stiff back. I was wondering if i could be pregnant. i'm pretty sure i am not, but i need to be sure. i have also been a bit nauseous but i haven't been feeling well lately even before the sex. what do you guys think?