Sounds like trauma.
Rest. Don’t do any PE. Don’t masturbate. Maybe take a break from sex or at least cut down. If you do have sex go easy. Way easy.
When you start getting morning wood again, wait - take time to make sure everything’s reliably back to normal. Then slowly re-aquaint yourself with PE: jelq lightly. Do an easy-does-it newbie routine. Be kind to yourself. Be gentle.
Depending on how rough you’ve been on him you might wait 3 months. See a urologist and get a check-up: you can chalk your symptoms up to rough sex if you’re embarassed.
You are likely to heal just fine. But you’ve really got to give yourself time to recover. You can tell your girl that you two got too rambunctious and you’ve got to go easy for a while. She’ll understand.
This happened to me when I was 19, although it was just from constant and aggressive sex with my very hot girl (I didn’t know from PE then). This girl loved sex, but she understood that Mr. Happy needed to recuperate. She gave me the space to get well again. Then we celebrated. It was actually really hot.
The penis is a surprisingly durable organ, but it does need to be given time to heal. Do your self the favour.
Before: I'd like to show you something I'm very proud of, but you'll have to move real close.
After: I\'d like to show you something I\'m very proud of, but you guys in the front row will have to stand back.
God gave men both a penis and a brain, but unfortunately not enough blood supply to run both at the same time. - Robin Williams (: