Well, if he'd found it during the hysteroscopy (the vaginal scope with no cutting)--that was less than an hour and I went to work the next day. But I'm one of the rare ones. The Mirena had gone through the uterine wall and was in my gut. That required a laproscopy (2 tiny cuts). Usually if they go missing it's the first month, but mine waited over 2 years to escape.
I am still very angry with my Dr. because after the hysteroscopy he told me the IUD probably just fell out. Well, I knew it hadn't because I was in so much pain I could hardly walk. I picked up my back X-ray my primary had done 3 months earlier and read it myself. The IUD was clearly way off to the side! I took it to the gyn. without an appointment and he quickly scheduled the laproscopy. He told me not to come for a post op! But I did anyway because the pain in my pelvis came back after 3 weeks. (scar tissue? adhesions?) He wrote in my medical record that I had a "vague pain" but I was "doing well." Needless to say I changed drs. Sorry to ramble on but the moral of the story is we should ALL CHECK OUR OWN RECORDS AND FILMS. You can't always trust doctors! Good luck with your procedure! It should be easy with you asleep and over quickly.