Lately, my bf and I have been doing anal raw. Since my last period, we did anal at least 6 times ever since (including today)

Sometime, his penis accidentally slipped out and I can feel it touch the opening of my vagina (like a quick 1 second) or like when he tries to stick it in and the tip accidentally touched my vagina for a quick 1 second...

My period should be starting in 3 days.

Is it possible to get pregnant by any chance from precum? Also, he pulls out at least 2 seconds before he came on my back.

I just wanna know. Please no mean comments.