Does seman "spill out"?

Had sex with my man last night. We are just dating. We were pretty drunk. I'm not on birth control right now and we did it raw. Also had morning sex. Several hours later I was at home playing with myself. Went to pee afterwards and after I went, a little white glob "fell out" of me. I was confused because that has never happened to me. Did he cum in me? Or am I overthinking it. I'm going to grab plan b in the morning just in case.