Hello, and where you are at now sounds very similar to where I am. Sounds like you're singing my song :) I'm 3.5 months post mirena, and grateful for where I am now. My month 3 period was pretty bad - always worse during my monthly visit - but most of the time everything is much better than it was. During periods my anxiety can flare, burning limbs, random head pains, etc. But, it goes away a few days after my period. On a day to day basis my lingering problems are hair loss, wicked heartburn, pain and pressure behind one eye, and pain/tightness in my hands.
I don't have any magic answers, but I'm planning to get the magnesium/potassium pills this weekend too. I just keep hoping that time will fix it all. Please update us after your dr visit, because I'm wondering if I have arthritis too, and if there's anything I should be doing. Are there any vitamins to help this?