Being sexually inexperienced makes this so much worse

I know that anxiety and OCD can affect you in a lot of ways and I know it can affect your sex life. I was having sex with this chick about 4 days ago and everything about was amazing. it was a random hookup. But I got tired quick and got so worried about meeting certain expectations during intercourse I lost my erection part way through and couldn't match her pace and that felt honestly embarrassing and debilitating. Like there is no way I should be not keep it up with this chick. But I am aware anxiety can destroy performance in intercourse and I look at porn and notice other guys maintain erections forever without constant stimulation. A few seconds with stimulation and I lose mine. But I am been like that pretty much forever. Do I have misconception about how that works or is something wrong with me cause the doubt sucks. The girl even said that it was weird how I got soft after not that long. But she tried to be supportive for the most part but it felt terrible. If i am not flexing by pelvic muscles it feels like I can't maintain it.

So I got dumped today by my situationship. For background, we talked for like 3 months, and I just recently lost my virginity to her. We only had sex twice. After she said we should still be friends, goofily (reassurance-seeking) I asked “but the sex was good right?” And she told me it was “good for a virgin” which hurt my feelings, then going even further she said “not in my top ten.” This made me CRY, like on the spot, right there in front of her (not the most embarrassing thing I’ve ever done…. But definitely in my top ten). I started having intrusive thoughts about how I’m unattractive/unworthy of love. She asked me why I was crying, but I just said “I don’t like myself very much,” which is always the underlying problem with me. And she reassured me that I’m “not a bad person” and “it’s not because you’re not smart or not beautiful.” But the reassurance made me spiral more, bc I was thinking “I didn’t even mention feeling unattractive or stupid, she can just tell that I am.” Then it kept getting worse and worse, “I’m unattractive/unlovable/stupid. I’m not good at sex, I’m not good at anything.” I had to stop myself and realize it was OCD obsessing over the things “wrong” with me. I think I started this post wanting reassurance, but now I think I want to know if anyone has any tips on accepting criticism as someone with OCD, bc it always sends me down a “there is something wrong with me” spiral.

Huge tw I’m so scared I’m a r*pist people have told me I am. I wanted to lose my virginity when I was 19 I felt embarrassed and ashamed I hadn’t. I decided to get drunk and find someone in a club to lose it to. I don’t remember much other than I was happy it was finally happening and remember thinking my plan had worked. I was told by friends that the other person was drunk and possibly on drugs. I must be a r*pist as I knew what I was doing and instigated it, I took advantage and used someone. I feel sick and don’t deserve to move on I can’t even apologies as it was a complete stranger what if they’re living with trauma because of me.