(NSFW) What exactly is this feeling one (female) gets after (rough, usually) sex?

I don’t really know how to describe this, maybe some of you ladies will just know what I’m talking about. Generally this only happens after I’ve had sex that is on the rougher side of things. It is not pain, or discomfort really, but I feel it now in the same area that I would feel menstrual cramps. Down below the stomach. It is definitely related to sexual activity. I really can’t find words to describe it further than that, just that I can “feel” it. Is it that things have gotten shifted around, for lack of a better phrase? Does that happen? DOES ANYONE KNOW WHAT I’M TALKING ABOUT? Like I said it’s not uncomfortable it’s just THERE. Has my uterus been shaken to its core? Anyone??????