Imense pain in uterus during bowel movement??

I’m 17 weeks pregnant and I know this might sound TMI but lately when i have a bowel movement i start to get really sharp intense pain at my uterus (or lower abdomen like period cramps). I notice it’s only when I’m performing a bowel movement not before, and doesn’t matter the consistency. It brings tears to my eyes, makes me gasp and i have to hold my breath to hold it in because it feels like something sharp is piercing my from the inside out and squeezing my uterus sooo tight.... i started less than a week ago and it’s been happening more often and hurts just as bad. Anyone experience this before or know what it means??