My boyfriend and I had dry sex, he was only wearing boxers, I was wearing underpants, and linen trousers. Pre-ejaculate did soak through his boxers because I felt it with my hand and saw it was wet, he did not ecjaculate, but then I gave him oral sex and he did ejaculate in my mouth, he then put his boxers back on and we started having dry sex again, so is there a possibility that a small amount of semen soaked through (as well as the already soaked through pre-ecjaculate) his boxers after I gave him oral sex? I am not sure if my fluids soaked through my underwear and linen trousers, or if his fluids soaked through my linen trousers and underwear. I was on my period, the 3rd day out of 5 days, using a tampon when this happened, what is the chance of pregnancy here? My trousers were not thoroughly wet, if anything a bit damp, can sperm travel through clothing? Could I get pregnant from this?

No u can't

The chances of you getting pregnant are so far out there that I don't even have a percentage for you.

Bottom line though, even if you're dry humping, a condom is always a good idea. Pregnancy can occur with pre-ejaculate, even if his penis doesn't entire your vagina. It's not likely, but not impossible.

The fact that he not only didn't enter you, didn't ejaculate, had on boxers, you were wearing underwear, had your period and you were using a tampon, well, I'm going to go out on a limb and say no, you aren't pregnant.