I’m scared

Blondie

Crazy question....

Is it possible to get pregnant this way?

My boyfriend and I were having anal sex and he came in me that way and it stayed hard but we didn’t take it out. We kept going and it slipped out, he tried to put it back but slipped it in my vagina by accident and now my period is 7 days late😩 and I feel nauseous all the time! Is it possible to get pregnant off the cum that was still on his penis when it slipped in my vagina?