I was intending to have anal sex with my boyfriend, and as he was trying to insert, it slipped down to my vaginal region. It went within the lips, but I don't think it went inside me. He didn't or anything, what is the likely hood that the precum coming in contact with my vaginal fluid could make me pregnant?

And if so, how long should I wait to take a home test and how long for a dr. test. I can't sleep and need to find out. I'm not ready for this at all:(

Please someone... I can't sleep...