That was my experience, too. It was absolutely brutal. Luckily, I was able to have it removed when I was put under for my bisalp a few years later.

On the other hand, I recently talked to a (male) gyno about my cycle being totally fucked up. One of the options for management was a Mirena IUD, and he told me that if I decide on that route, they'll bring me into the OR and do it with proper pain management and sedation.