Can you get pregnant from dry humping?

Hi. I was dry humping with my boyfriend a few days ago and I have become a little worried.. While we were dry humping, he didn't have any clothes on, while I was fully dressed. I was also on my period so I was wearing a tampon. He didn't orgasm while we were humping, but I am still curious, is it possible for sperm to travel through my shorts, panties, AND tampon?? Thanks!