Popping noise?

A little bit TMI--

--My SO and I really got into the moment last night, and we had sex on the bathroom sink. It wasn't uncomfortable, but there was a clicking/popping noise everytime he thrusted. He said he could hear it too. It felt like he was moving something. I assumed maybe he was hitting my cervix or something? We stopped before I could get off, just because I was weirded out by it. And about 10 minutes later we were laying down for bed, and my stomach got really hard and it hurt. It went away after a couple of minutes. And now this morning when she moves, there's a little pressure and I'm sore down there.

Is it just him hitting my cervix when it pops like that? And was it just Braxton hicks? Or do you think she was a little uncomfortable and just got mad and rolled into a ball or something?

I know it might be silly to ask, I was just weirded out and nothing I Googled helped. I'm also 25 weeks. :)