Please help

Okay so today me and my boyfriend got freaky right? He hasnt jerked off and came in over 2 days, keep that in mind. He was jerking off and i was rubbing myself then he slid it in and we has sex for about 5 minutes he hadnt came and then once we finished having sex we both still hadnt came yet so he continued to jerk off and i continued to rub yenno? Then i came and then he came. Is there a possibility even if he didnt cum in me i could get pregnant? Ik precum can have some sperm in it but he hasnt came in a couple days so it wouldnt be there anymore right? Im young and im just worried i dont wanna be stuck with... yenno. So yeah is there a chance at all even tho he didnt cum inside of me?