Can I Get Pregnant From Dry-humping While Wearing Pants And Underwear If My Partner May Have Pre-ejaculated?

Hello, I am a 18 year old woman with a question in regards to pregnancy. Me and my boyfriend were dry-humping, I was wearing both pants and underwear however he was not. he did not ejaculate, although i am concerned he pre-ejaculated unbeknownst to me and i was wondering if conception was possible from this.