me and my girlfriend had sex and I pre-cumed in her a little.

Unfortunately.....yes is the answer. It only takes the smallest amount of sperm to fertalise an egg and it can live upto 7 days in a womans uterous. A condom is a must...even when mucking around and not having full intercourse. I would recommend her doing a pregnancy test in the next few days. Good luck and remember to play safe next time. x

Adding to my lst reply, she is still in the time zone to be able to take a morning after pill, which will work well within 24 hours of intercourse. She will need to consult her GP asap though. Another answer would be for her to have an IUD implanted, which if pregnant at this early stage would miscarry the foetus, but would be a preventative for a good 5 years for her....depends on her age though and what the GP suggests. Hope this helps. x