Please help..

So I'm 14. Going into high school. And shouldn't be doing ANY of the stuff that I was doing yesterday. But unfortunately I was. And now I need some help and answer. Yesterday with my boyfriend we were doing some stuff we shouldn't of been doing. I was giving him a handjob and he ended up cumming all over my stomach. I'm afraid one drizzle went down near my vagina and I have no idea what to do. I'm so soo scared I'm pregnant and I have soooo much going for me. I can't afford to get pregnant. I need to find a way to get the Plan-B after pill, but where am I supposed to find the money for that? Can someone please explain if I could be pregnant?