I’m dumb

I think I need to talk to my mom. I had an incident where cum was near my vagina mode towards the butt. I don’t remember it being near my vagina from how we wiped he just went in my butt crack a bit. But even if I am not pregnant I need to talk to my

Mom about different forms of birth control because apparently from what I have read it isn’t strong enough and a lot of people on here say that they get pregnant using condoms and pulling out with a condom on birth control. I want the IUD but I didn’t feel comfortable telling my mom I was having sex how should I go about this and would I even be pregnant in the first place I