So my gf and I had sex last night and the condom came off in the middle of it and neither of us realized it until well after it had happened. However, she had just finished her period yesterday and I had came before we started having sex... and then didn't come again while we were having sex. I'm kind of certain that some pre-come came out just because thats what common sense would tell me. We're going to get Plan B (the morning after pill) in a couple hours.

I've read a bunch of stuff saying that the day after the period ends doesn't have any real chance of getting pregnant... but also that sometimes different peoples timings are different and that pre-come can scoop up and push out some of the leftover semen in the urethra. What do you think the likelihood is that we'll get pregnant?