Welcome! I'm glad you are having the Mirena out. I've read hundreds of posts that say they felt better very soon after taking it out. (Some women do get a relapse at the 4 month mark.)
The test I wished I had was a blood or saliva progesterone. Mine wasn't till 5 months after removal, and it showed that my hormones were way out of way. The Dr. said she wished she had the levels before it was taken out for comparison. Also, it would have been "proof" of what Mirena did to my system.