
It feels like a cramp that’s deeper in your core, but not anything that couldn’t be comparable to a bad cramp. My IUD was a similar sensation (slightly more painful, little bit of a longer process, and the damn tenaculum). ALSO, if you can schedule an appointment right before/right after your period, your cervix is a little dilated. You can also ask your gyno if they’d do it while you’re on it. I got my iud on my period, and it was actually beneficial.