Precum on finger then bathroom

Ok well my girlfriend was giving me oral sex and she might have got some precum on her finger....then she went to the bathroom and she wiped herself....is it possible for her to wipe herself and maybe have her finger hit the lips of her vagina?? and become pregnant??

I know it sounds kinda of awkward, but i just keep thinking about it.

P.S. she is on birth control as well

Thank you

Yes