Venting???

😞 so there's this guy I've been seeing for a while and we've been messing around and just the other day we were kissing which I thought was fine but then it got more intense and he asked if he could stick it in once 😩😩 big mistake cause I knew already that its not going to be just once but I'm really afraid of saying no (due to some previous experiences with an ex) and so I let him which he ended up pulling out and nutting but idk I'm really scared about getting pregnant and I feel like with just my luck I might be but it's been only 3 days since so I don't know if I'm just psyching myself out. needless to say I just wanted to vent for a sec.