My gf and I was just getting freaky this day, I masturbate and ejaculated on her back, but then some of the semen leaked down between her butt cheeks, I quickly wipe it off with tissues but I'm not sure if any of the semen reached the outside of her vagina. We wiped it and went to the shower to clean up and she washed her vagina with the shower head, is there any chances of her getting pregnant this way? And PS she should be having her period tomorrow if this info is useful.