Pregnancy chances from fingering ?

My "girlfriend" and I were engaging some sexual activity, not sex though. Needless to say, eventually i came. When i did i had my penis in my hand and i was putting it back in my pants. I got a little semen on my hand and some on my finger. I then wiped my finger a little and i then fingered her, but there still may have been a little amount on my finger. She is a virgin and this exact situation has happened to us before, but we're extra worried this time. What are the chances she is pregnant?