Okay So I'm 15 Y/o And I Had Sex The

okay so I'm 15 y/o and I had sex the other day but it didn't involve penetration I heard that pre ejaculation can cause pregnancy if the boy ejaculated earlier. I also heard that urine can kill that sperm which makes it unlikely to get pregnant. I looked up the symptoms and I don't really have any of them so I was wondering the possibility of me being pregnant