Hello there, I am glad to hear you are getting the EVIL removed!
I was a 5 yr mirena user, but symptoms started about 2.5 yrs into it. When I had the Mirena placed in 2005 the only symptoms I was told about was heavy or absent periods, expulsion of Mirena, tubal pregnancies and a chance of PID. Nothing about the horrible mood swings, depression, hair loss, acne, hair growth on face/body, you name it I had it, well except weight gain.
It is sad that doctors dont recognize that this EVIL is not for everyone and if anything changes with your body/mental state you should talk with your doctor immediately.
I know how you feel, I also felt like I had missed out in the last 2.5 yrs of my 5yo sons life, 9yo daughter as well.
I was not an unhappy person either before mirena and I became someone that I never would've imagined.