I havent came in a week and i was just wondering if precum is possible. And if so could it impregnate my girlfriend?
Yes, and Yes. Many pregnancies have come about because men or women, or both, have the misconception (sorry about the pun) that just because ejaculation does not occur, neither will impregnation. Of course, if you two are trying to make a baby, then be assured that 'precum' can contain enough sperm.