Weird sensation

So health question: Has anyone ever experienced a “charlie horse” in their stomach? Its the only way I can describe it. It happens randomly during normal movements but its like the right side in my pelvic area/lower stomach clenches up into a fist and I have to slowly stand up to release the pressure until it unclenches. It doesn’t hurt it just feels like a fist clenching my muscles in my stomach. I had a C-section last year and there were no complications but could this just be really weak stomach muscles? Almost like a pulled muscle? Its really Starting to freak me out but cant really afford to go to the doctor and get more bad news lol.