You seriously have to be careful! I found myself in the same situation earlier this year. Both my girlfriend and myself are virgins but sometimes, in the heat of a moment, find ourselves fooling around and going too far. We've never had sex and I've never ejaculated near her vagina, but every once in a while there is precum. Well, this one time in particular, I got a little too close without thinking and I'm pretty sure I got precum on her. Well, later that week I got to thinking about what happened and started to freak! It was the most miserable time in my life! I was so nervous and upset I couldn't think or even function. Turned out it was fine, she got her period shortly after. I swore I would never get myself into that situation again. However, I'm there again right now. A few weeks ago me and my g/f were dry humping with our underwear on and there was precum and no ejactulate. I'm pretty sure everything is ok again, but I'm still pretty shaken up! I'm waiting for her to get her period so I can relax! I need to learn my lesson! So please be careful Scared Guy!