Tummy Twinges

Ashley • ❤️🧔‍♂️👩🏼2x👧2x👦TTC#5(6x👼)❤️
I know I'm not pregnant... but for the week up until ovulation, and occasionally right before I start, I get hard 'twinges' in my lower abdomen... usually on one side or the other... it usually occurs along with cramping. what could it be?