What are the chances of her getting pregnant?

We had an unprotected sex, not literally a sex but it only lasted for like 2 - 5 mins because to be honest me pinus is not that big and i am having trouble putting it inside her, she s only 18 and i am just turning 17. yes i know its stupid and we totally regret it we re being paranoid right now it s been like 3 days. so what happened is we re just making out and all and we decided to try it just "for a few" so we did, at first i was having trouble and all getting it inside her, she was on top of me and my pinus tbh is not that big that s why so there i got it in but only for seconds and when i feel like coming i put it out asap and then stopped then tried again and when i was having trouble getting hard i just kinda jerk it off to make it hard then i ejaculated but not inside her nor touching her i just told her to stop and not to do it anymore and it s enough, what are the chances of getting her pregnant? take note i didn t ejaculate inside her and it didn t touch her vagina and i didn t get to put all inside her because it was small and i was having trouble, we re just getting worried and stressed about the consequences i know you can t tell whether she is or not but i want to hear your thoughts