yes a few people have mentioned thyroid and Iodine connections with mirena, i do think it is worth us all keeping an eye on that one. certainly worth trying Kelp tablets which are a rich natural source of iodine, to see if any symptoms improve. obviously if your doctor is going to give you tablets though, don't take the kelp without talking to him first, as you could end up with too much Iodine in your system, which is as bad as not having enough!
good luck, let us know how you get on. x