Charlie Horse in my lower uterus

Johanna • Mommy of 1 beautiful boy! 5/20/2019 💙

Ok guys FTM mom here, I’m 34+4 weeks and really feeling it! Sleep is non existent anymore, once I wake up to go pee there’s no going back to sleep for more than 20-30 mins. So while I was tossing and turning last night, I go to turn from my left side to my right and the whole lower bottom right hand side of my uterus started seizing up like a Charlie horse. It lasted about a minute and there was nothing I could do except breath through it. Sometime later in the night it happened to my left side as well. It came in a wave just like a contraction would and then was done. Was that my round ligaments or something else?!?