You aren't going to get pregnant from fingering. Besides, YOU gave him the hand job, didn't you? So, most sperm would be on your own hands. Right? But regardless, he wiped his hands off. And even if he didn't, it's unrealistic that this could EVER lead to pregnancy. Pregnancy happens after unprotected intercourse, penis in the vagina. I'd not be the least bit concerned you about pregnancy from what you describe. But since you are this sexual, you should get some condoms or go on the pill to be prepared in case it goes further.