I had one under GA last year. Was absolutely fine. I am so glad that MN forewarned me and empowered me to argue my case. Gyne was puzzled why I was adamant, given that I’ve given birth basically and have had IUDs for many years. My point was that this was why I knew I would not tolerate hysteroscopy. I find IUD insertion extremely painful, difficult and distressing, barely tolerable even with diazepam and maximum OTC PR.
GA absolutely fine. Gentle. No nausea. Dopey for the rest of the day. Took the next day off work, as I know I take a long time to recover from GA, I’m physically fine, but I’m liable to make daft decisions and doze off randomly.
Discharge like a watery period for a week or so. Longer than a period, but far lighter. Cramps for a few days, not particularly severe. Paracetamol for a day or two was all they needed.
if I have to have another, GA is definitely the way to go. Though I would consider IV sedation, too. I recently had a molar extracted under sedation, and that was almost as painless and untraumatic as GA.
Hope it goes well for you.