Wake up to Charlie Horse Pains In Legs! ??

Kayla • Finally conceived after a year of trying! Born with Uterus Didelphys! 2 cervixes, uteruses, and two vagina holes!
I've woken up 4 times now. To make pegs having the worst pains!! There so bad that all I can do is grab onto them n scream.. until about 15 seconds after they go.. then my legs feel dead right after. . Still sore.. anyone else get these? Or have an explanation for me?? I'm 22 weeks pregnant! !