Hi StillMe
from me too!
Firstly I agree with what's been said - if you have a Mirena coil, then the doctor cannot say from periods or a blood test whether you are post-menopausal. FSH levels can go into the post-menopausal range during peri-menopause - and one member on here was told she was post-menopausal when she had only missed one period - which was rubbish. Similarly - if your periods stop with the Mirena - they do this with many women - then it just indicates that the progestogen in it is preventing the womb lining from thickening, and your oestrogen levels are falling (often during peri-menopause if not before). Any woman whose periods stop with the Mirena, would find they resumed at some point, if the Mirena was removed (obviously after a certain period of time they would not return when you did become post-menopausal - but this length of time is uncertain). If you use a Mirena - you cannot determine the date of your menopause!
If you still had the Mirena in when you started HRT - if this was continuous combined HRT - then chances are that some of the progestogen from the Mirena was also getting through into your system - so giving you too much progestogen. If it was oestrogen only - then
?
Anyway I agree that if the Mirena suited you why not get another one? As Dancinggirl says you can then take tablet patch or gel HRT. Which type you try is down to individual preference and which type your absorb well. With Mary G it's the gel. Many of us ( myself included) use patches successfully for many years and many women achieve perfectly good and sometimes very high levels oestrogen with them - and they do come in a range of doses.
As well as how well a particular type absorbs through your skin, it is also a question of preference - tablets are taken daily, gel is applied daily and patches stuck on twice a week.
Hope this helps and good luck!
Hurdity x