You may want to evaluate how much Iodine is in your diet. It affects the production and effectiveness of all hormones. This is important, since insulin is a hormone and Iodine deficiency is linked to PCOS. You may want to get more sea fish and/or kelp in your diet to see if it helps. There is a great Iodine Support forum here on Curezone that you may want to poke around in. There are some first hand stories in there about using iodine to treat ovarian cysts.
It can be very hard to lose weight for some of us while on Mirena. Since I got Mirena out (almost 4 weeks) and I have started iodine supplementation (12.5mg/day for almost 2 weeks) I have had a dramatic improvement in my energy and can finally eat healthier foods. This is helping me slowly work on my weight. I half-wish I had tried the iodine first to see if I really required both steps, but I couldn't deal with the anxiety attacks any longer. The good news is, no more anxiety attacks for me. :)