I was about the same as where you are now (without the reflux). I still have the fatigue, insomnia and anxiety. I saw a chiropractor reqularly and it helped tremendously with the back pain. but like I said, I am not in a good place right now, and I would be irresponsible to attribute it to the mirena.
the thing you have to keep in mind is that a hormonal imbalance is very delicate, and it can take ages to rebalance. I am also not convinced that this thing did not somehow mess with our neurotransmitters.
I will be 2 years post in nov. I know it's frustrating. the best thing I can tell you is to enjoy the victories, b/c if you look back to pre-mirena you will just frustrate yourself.