My first few times were basically the same way, and pretty much every single person I know that I've talked to about it says their first few experiences were the same way.

I won't give further advice because after that relationship I finally came to terms with being asexual. I honestly knew beforehand, but didn't want it to be true and thought that by having sex with this guy I could prove I was "normal," which...wasn't exactly a great idea, but that's a whole different story.

But despite my circumstances, I still think the experience itself is incredibly common, and I really don't think there's anything wrong with you. From what I've heard, it gets way better after the first few times.