About 15 hours ago I had penal/vaginal contact, but no penal penetration, and I'm wondering how likely pregnancy is. My partner had some liquid on the tip of his penis, but he didn't ejaculate for another 10 minutes or so. The thing that worries me most is that from what I've just read, there is sperm in even that little drop, and if he fingered me after (I don't remember what order everything was) it could've entered my vagina and possibly fertilized an egg, and I'm probably a week or two from my next period (My periods are not very regular, and I'm 18 years old). What is the likelyhood, and what should I do? Thanks.