Freaking out

So I feel kind of ridiculous posting this but I'm freaking. Last night me and my boyfriend had unprotected sex (idk why I decided it'd be okay to not make him put a condom on because I always make him put one on). He pulled out like ten seconds before he actually came. But I'm still freaking out whether or not if any dripped down that I could be pregnant (I'm also on birth control). It sounds dumb but I never thought about it before 😅