Oh my goodness.. I thought I was alone in all of this and I have always been suspicioius of my MIUD. I take Armour Thyroid and was just recently diagnosed with Hypothyroidism. I have been very moody and developed a confrontational temper. Funny how came across this because I was wondering if my MIUD and thyroid meds would interact well. I am driving everyone crazy in my house and most of all I am driving myself crazy. I guess its time to talk to the doctor about all of this. Thank you for the wake up call.