My girlfriend and i messed around a bit while in bed. My penis accidentally rubbed up against the outside of her vagina and i'm worried about precum. I didn't ejaculate or anything near her or at all. I've read stories about where precum contains sperm and the sperm can travel from the outside and into the inside of the vagina and impregnate the girl. Someone help...i've been freaking out and stressing so much..... please!