Could I possibly be Pregnant?

I am currently on day 24 of my cycle and won't start my period until 4 more days. Two days ago my boyfriend and I weren't exactly having sex, just hj, BJ, and fingering actions. When it came time for him to finish, he came on my back and I thought I had felt some get on my outer labia? 
I honk I might be getting paranoid, but I wiped it off and now I'm scared it might have went inside me even if it wasn't directly on my vagina. Any help is greatly appreciated.