I am so glad I ran across this site. I had got the Mirena in April 08 and started having leg cramps and foot cramps all day, as if I had just run a marathon, but trust me I couldn't even run a block. I am so tired all the time and recently started having headaches lasting for over 3 weeks, they have caused me to be dizzy and "not focused". I actually went to a MRI clinic today for a CT scan because I was convinced I had something going on. I also had my doctor run blood work today. After reading these posts, I am thinking it could possibly be the Mirena, I hope so, at least I can have that removed.