My Girlfriend And I Were Masturbating Eachother One Night, When

My girlfriend and I were masturbating eachother one night, when I went to touch my penis, and then I went back to fingering her, I'm afraid i may have got some 'pre-cum' on my hand when I touched my dick and then put it in her, first of all, does pre-cum' contain sperm? (Made from the Cowper gland allegedly,) and I urinated before the incident so surely I couldnt have any in my penis from a previous ejaculation. I was just wondering the chance or possibility of pregnancy, as neither me or my partner are ready for a kid.