I have never heard about tetosterone in Mirena but whatever they are putting in there is very toxic for some of us.
You should also know that the best way to absorb the progesterone is through your skin, that has been already medically proven.
Check in here about other posts with plentiful information on what cream is best and how they are using it.
Remember that any pill is again another syntetic steorid and it will mean other side effects.
Wish the best for you.