My boyfriend fingered me a while ago and I gave him a hand job but he didn't ejaculate but he did precum. He touched his penis but I'm not 100% sure if he touched the head or not, thus touching any of the precum. Anyways, he fingered me and his finger went only about 3cm at the most up my vagina, but he sort of lightly wiped his hand off before. How likely is it that I might be pregnant?