This is a long shot since you posted this reply so long ago but what was the result of your adrenal testing and everything? Did it improve in time? I had the Skyla put in which is like the sister of Mirena and now I have Hashimoto's disease and possibly Addison's as well. My symptoms are similar to yours although they have greatly improved since having the IUD removed. Did you end up finding a treatment that worked for you?