Can a girl get pregnant from dry humping?

ok so on friday of my girl friend was on top of me and she was only in her underpants and i was only in my boxers. she was moving like we would be having sex but obviously we weren't. i had quit a bit of pre cum but i didnt ejaculate. I was wearing the top of boxers where she is a hole by the penis and i checked every so often to make sure it didnt fall out and to my knowledge it didn't but i guess its possible. We are both virgins. She had her period the week before we did it if that means anything. We were doing it for like 2 hours cause i was fingering her while we were doing it and she said she could feel my penis and it felt good for her. my penis wasnt pointing up if that makes sense like it was flat so she never felt the tip. I have been worried about it since friday and i told her today and now she is completley freaking out which is making me freak out anymore. i dont think her mom would let her get an abortion and i'm only 15 and so is she so a kid would completley mess up our futures. She can't get a test or go to the docotor cause her mom would legit kill me, so we just have to wait until her next period i guess. I didn't ejaculate before hand, i didn't even at all that day. Is it possible that there was sperm in my precum and it swam through my underpants, through her underpants and into her where it found an egg and fertilized it? please help me i am freaking out!