The hunger comes from the Mirena messing with your blood Sugar levels. I had the same thing, as well as all the other side effects you mentioned, and then some...
Bayer warns doctors to use mirena with caution in diabetics.
Read the Bayer report at http://www.mirena.ca/en/pdfs/MirenaEn.pdf
, you may find a lot of the side effects and warnings and precautions here. Take the report to your doctor if he or she doesn't believe you. Take care.