Pulled out

Hey yall, so it’s kinda embarrassing but I don’t know who to turn to and ask about this kind of stuff to not even my sister knows. So last night me and my bf had unprotected sex, but he pulled out before anything could happen. Yes I do know about STD’s and stuff but it was a in the moment thing and it was also our first time and stuff, but should I be okay after that and not worry about it? Both of our parents don’t know that we did that, I just know that if they ever did we’d be dead. Yea I know we both should’ve know better but it was a in the moment thing and we didn’t have protection with us. I’m also thinking ( have been for months) about birth control, I just don’t want to bring it up to my mom and her think me and my bf did something ( technically we did) or her think we’re planning on doing something. So does anyone have any suggestions on how I should bring it up? Sorry just been freaking out about the whole thing since then so I really need something to ease my stress/worry.

Sorry I’m just new to all this and I don’t mean to get anything wrong or something, I’m still learning on ways to help prevent stuff yk. But should I still take the plan B even if we’re sure he pulled out 100%? But at the same time I’m like worrying maybe I should take it just incase you know to be safe but I don’t know how to get it.

My bf thinks I’m overthinking it, and I should be fine but I’m not sure at all. Also think I’m annoying him with my worries about this, but anyways. I don’t know