I had the mirena put in after my fouth child in December 2004. I continued to have my period like normal for about 6-9 months, then my period stopped. I began to have problems with anxiety, and they seemed to be worse when I was suppose to get my period. I am a registered nurse, and I thought with the stress of working, and four kids I am suppose to have anxiety. As time progressed my anxiety got worse, and I was curious if maybe Mirena was linked. I found in the pamphlet that it may cause mood changes. Well the more I investigated I found I was not the only one experiencing this extreme anxiety. I had my Mirena IUD remove 7/20/07, and right away I could feel the difference. It was like my body knew something foreign was in it and reacted. I also talked with a doctor at the hospital who said because Mirena is inserted in the uterus, the progesterone is absorbed right away. Birth control pills are taking orally and not directly absorbed. Some women may not be able to handle direct absorption of the hormone progesterone. I was one of them. If you have side effects that coinside with the insertion of your Mirena IUD, talk to your doctor, and have it removed.