Okay I Know It May Sound Weird If You Can

Okay I know it may sound weird if you can get pregnant if your boyfriend fingers you? It was January 9, and me and my boyfriend were doing some sexual things. We had oral sex and I gave him a hand/blow job and he ejectulated himself and had some one his fingers and he wipe it off and then he started to finger me very harshly, and is it possible if he has still has sperm on his fingers. Since that day I've been worried if I will ever become pregnant, can that possibly happen?? Please respond, I'm only 17 years old and it was my first time doing it