I was having sex with my girlfriend and at some point the condom slipped up about halfway. I check it a couple times before this so it couldnt of been more then a minute or two. I didn't ejaculate nor did it come off all the way. I'm not to worried about it but my gf is and thought that Id ask to see if I should be. Also, as far as pre cum or whatever it had been about 30 hours before that I ejaculated.