I'm a 24 yo female:
I had PIV sex two days ago for the first time in over a year. It wasn't as painful as the last time I had sex before that, which was a truly horrible experience (I had my period and was pretty much coerced into giving myself to this guy).
Anyhow, I have vulval lichen sclerosis (it's pretty dorment for the majority of the time) and as a result I have always had that remark ''geez you're so damn tight'' (or similar). So, I didn't experience pain when he entered me or was even thrusting..only when he went really deep. He was average length and thickness so I can't really imagine it was an issue with size.
Was it simply a matter of him hitting my cervix? I've never really had issues with that kind of pain before, though in saying that I haven't really led an active ongoing sexual relationship in a few years with anyone. I guess I'm just a little scared the same thing will happen the next time we have sex (possibly today or tomorrow). Should I just try changing positions and see if that makes a difference? It hurt less when I was on top as opposed to him.