Sex & he came on outside

So me & my bf had sex on the 12th he came on my vagina like the opening area. I know it's a stupid question but could I get pregnant if he came on the outside? I immediately peed after sex then when he left my house I took a shower to tried to get the rest of the cum off. (When I was cleaning myself after we did it he took the towel from me & wiped it in not out/off) Help me please ladies