I happened to notice your post, but since it is an older one, you might get more responses making a new post.
I'm sure you've searched around and noticed that MANY women have the same issue you did with Mirena. I am thankful that this was a side effect I didn't have (had many others). I just saw a post by someone on BAN Mirena IUD on FB that stated the following:
"I am not posting this to sell anything. I don't gain in any way just thought it might help others in my situation. Lost tons of hair when I had the Mirena and was going sick with worry over it. Tried everything and was considering hair transplants but decided to give Natural Wellbeing Hair Essentials supplements a try since they were only $30 and after two months I am seeing new growth! Beyond happy about this!"