25 y.o. had sex for first time. Couldnt keep it up. Possible trigger?

I found out the hard way. All this i read about how pmo will cause P.I.E.D and I'm like, "nah, that can't be me, I mean I only pmo once or twice a week. Ill be able to keep it up. Im young too." Boy was I wrong. So anyways this chick I met comes to my house. Shes a little tipsy I mean today is friday. We're talking about whatever. I start kissing her neck. Im getting pretty horny mind you. So im like lets take this to my room. She agrees, and i carry her back there. Shes a freak! I wont say buy she starts asking me to do CRAZY STUFF! anyways we get to the point she ask if i have a condom. I actually had bought my first pack because i knew i would get her to my room. So i whip it out put it on and we start up. It was good at first but then after about 2 or 3 mins i start going flacid and shes like "Do you even like me?" What the fuck do i say to that?! I honestly just wanted to fuck and get my virginity off my list. But im like ill eat u out. I ate her and she was happy, but i couldnt even get hard doing that. Porn has ruined me. 25. Young. Not out of shape. Fairly good looking. But cant keep a hard on? she was ok with it. Shes actually asleep right next to me right now. I just want to take the time to tell all the masturbators out there... Stop. For yourself please, just stop. Im taking this lesson to my grave. I will no longer pmo after today. My first experience was pathetic.

TL;DR I had sex for first time, couldn't keep my dick hard.