lmao pls help

I’m such a dumb bitchhhh. so I’m on birth control, I have an iud. I got it at like the beginning of March so I’ve been on it for awhile. I had sex the other day and he came inside me and now I just feel all weird. Maybe it’s my nerves but I just feel different like today my ovaries felt not painful but I felt them? And like I know I shouldn’t be having sex if I’m gonna be stupid about it. But the thing is i feel like I’m gonna be that .5 percent that gets pregnant. I’m not scared I’m just iffy about the whole situation. Like what if. I JUST NEED MY NERVES CALMED🥴