First times sex

I had sex my first time ever and it didn't hurt ❤️ everyone says it does was something wrong and to make matters worse he quickly went limp. I had him all hard and all the sudden he stuck it in said he cumed real fast and then nothing then I gave him heAd and boom again. Then just limp. Maybe the heat maybe because we were in the car? I'm so confused whawith it all I was also plastered (drunk and I did give hime consent )