I've just come across this on a site:
"One of the problems that long-term use of mirena causes in the female body is hormonal imbalances: low progesterone and high estrogen — a condition coined “estrogen dominance.†Progesterone is the female sex hormone and plays an important role in a female's health. When a woman is on Mirena, the natural internal production of progesterone in the body eventually stops and shuts down completely, since the body was getting sustained release via synthetic progesterone from Mirena. If & after the Mirena is removed, the body would no longer be getting any synthetic progesterone from the mirena, nor would it be producing any progesterone on its own internally, and this causes serious havoc in a woman's body and a severe hormonal imbalance: now there is no progesterone, and too much estrogen. This is why women go through withdrawal symptoms and experience hell after removing mirena.
If we have had Mirena for a significant amount of time and then had it removed, we need to reverse that imbalance after mirena removal and bring our progesterone & estrogen levels back to normal. This can be approached through diet strategies and applying progesterone cream topically. "
I'm pretty certain I fit into this camp, I used the Mirena for a few too many years.
This is like one big jigsaw, funny how the pieces all start to come together. Natural progesterone (Utrogestan) seems to be working for me but I wasn't aware of the above or I may have 'got there' sooner..
GG x