How do i fix this? i dont know what to do?

So here's what's going on. I'm overage so I really don't need to be b**ched at. I've been with this guy I like for 2 weeks. We've been hooking up. But today he bent me over for doggie style. Doggie style hurts me.so after a minute I quit. He got pissed cuz I stopped. After a bit I told him why I stopped but I don't know. I still feel embarrassed and bad