If you have had polyps and erratic bleeding then you might want to consider having a Mirena fitted and use oestrogen transdermally as patch or gel, as this can be deemed slightly safer and more convenient overall. With a Mirena in place, 60% of women won't get any bleeding at all and you can use any dose of oestrogen to help the flushes and protect your bones.
See how you get on with the Kliovance and then review. DGx