Hernia vs. diastasis recti

Hey there everyone! I already have an appointment with my doctor, but it’s a few weeks out. I’m wondering from those who have experienced either a hernia or diastasis recti or both after twin/multiple pregnancy how it felt for you.

I’m about 17 months post c-section for twins and over the last few months I’ve been having these moments every few days where I cough or sneeze (or poop lol) really hard and end up with pretty intense and tight abdominal wall pain/spasming. It feels like something is moving into the wrong place. I have to lay flat on my back basically or stand up super straight and then wiggle side to side to stretch the muscles to get it to stop. Feels muscular, but I’m not super familiar with organ pain thankfully so I’m not sure how a hernia would differ. This last time it happened, I legit saw my ab muscles twitching and contracting involuntarily for about 30 secs.

Thanks for any anecdotes!