After a full night of partying, around 6am, my girlfriend and I started fooling around. I performed oral sex on her, and soon after she did the same, moving to a handjob while I came. I was pretty intoxicated, and was ready to get some sleep, however she was not tired and sat on top of me. Soon enough, probably around 5-10 minutes after I came, she was putting my penis inside her as she sat on me. I unfornatually was too intoxicated to stop as it felt so good, and thrusted her for about 2-3 minutes until I realized I was doing something pretty stupid. I realize that sperm dies after drying within a few minutes (i'm not sure how dry it became) and she was not on birth control, which I asked about after. I do know when I went back to my apartment 15 minutes later, I did notice very little cum in the tip of my penis before I went to the bathroom. I'm pretty worried. What's the probability she is/isn't going to become pregnant? We were unable to get morning after pills as we live out in the boonies. Should we wait until she should have her period to be tested if she misses it? I haven't asked her when she is due for her period yet... If it was scheduled for 3-4 days after we had sex, and she had it, does that mean she is not pregnant? Or would it haev to go to the next cycle? Need some advice,

thanks!