Hi PMB63. Have you considered trying Estradot patches ? I am currently using these with quite a bit of success, after trying several different regimes, including Evorel Conti. Estradot come in different strengths and are oestrogen only so you would need to take progesterone separately alongside the patches. I didn't fancy the Mirena either so I use Utrogestan which I believe you can get as 100mg or 200mg and can be taken orally or vaginally (although it's not licensed to be used vaginally in the UK so if you decided to go down this route, you would need to speak to your doctor).
Hope this helps.
Rosie63 x