Really need help/ advice

hi, so i've been seeing this guy lately and i stayed over at his house, one thing led to another and we had sex.. I was a little drunk and stoned so I don't know if he came or not, i remember we both decided to finish and we stopped but I don't know if he came or not-- anyway! then i didn't see him take off a condom or anything but i remember him putting one on. I trust this boy but i'm i was embarrassed to ask.
i have already taken plan B in June but should I take it again to be sure? I am not on any birth control and i'm nervous, should i take plan B just in case? or is it bad because it'll be the second time this year ??(!)
thank u honeys 💌🍾