The morning after 😫

Me and my bf had sex last night. We use the withdrawal method but he asked me to give him head instead of just clean up the cum and had round two and he came again. Think about it now i feel like an idiot for not stopping it, and now im worried that i maybe come pregnant. Which is not what we really want right now. I want to get a morning sfter pill, but he believes nothing will happen. Should i get it just to be safe?