Me and my girlfriend had dry sex a couple of days after her period was over. I had no underwear on but she had a pair of knickers on, but they had small holes in, like mesh material. I did not ejaculate while doing this, but I think i was in the pre-cum stage while it was happening, so it would have gone onto her underwear right? She had her pants on the whole time we were doing this, so i did not penetrate her. I am really worried that she could get pregnant so I wanted to know how likely it is that this will happen: Highly Likely, Likely, 50/50, Not Likely, Highly Unlikely, Almost impossible or 100% impossible. Thanks.