pregnancy paranoia

i didn’t have sex but me and my ex were fooling around and he was rubbing his penis around my vulva.. he didn’t ejaculate but he probably pre-ejaculated a little on my vulva (the lips).. im 16 and i’ve learned not to have sex because im very caution so i didnt have sex with him.. but i read online that its could seep into the hole and you could get pregnant so im lowkey scared. the last time we used a condom for like 30 seconds and i stopped because it hurted.. my period was 12 days late because i was so worried and being pregnant🤦‍♀️ this is why i should just wait till im like 20 to do anything because im so paranoid..