Weird but help

So me and my boyfriend was intimate and he was hitting it from the back (doggy) and when we was done. I literally felt dizzy idk if I was exhausted or what. But he told me when he was inside of me he felt something and he was hitting it and it felt like it was moving

So my question is what could it be? Can a female gspot move? He was really deep but idk I did feel like I was gonna squirt but it didn’t happen?