So last night I had pretty bad cramps, and this sounds kinda strange but the cramping was also  like at my butt? of course I googled this and it seemed it's not that uncommon, but now (it's the morning) and my lower abdomen is sore, like to the touch and when I move. this has actually happened once before during my period, and it is just an incredibly uncomfortable kinda painful feeling? are the muscles like overworked or something haha? any answers/help/advice?

Thanks!