PLEASE HELP ME

So yesterday I had intercourse with my boyfriend and we kept going after he finished (we were using protection). I'm not on birth control and I'm worried that some cum could have slipped. The condom is already tight on him as it is and when we were done, I checked the bottom of his penis and it was dry. I'm not ovulating, I actually just got off my period two days ago. Please help me, I'm young and scared.