Hi jillyt39
Your post is not long by any standards! No need to apologise. We're here to help.
Glad all is OK with your womb lining. What I am confused about is your reference to utrogestan and why you are taking this? Were you taking it while you had the Mirena coil or did you go onto HRT after stopping the Mirena due to menopause symptoms?
If you are taking HRT as well then the good thing is that if you have another Mirena inserted you won't need the Utrogestan, because the Mirena also protects the uterus from thickening as part of HRT. Probably unlikely to do you any harm in the short term but I wouldn't want to be taking more progestogens than I needed to protect the womb in the long term - due to potential unpleasant side effects.
In terms of Utrogestan on its own without the Mirena - if you are taking it as part of HRT and do not have any other issues with fibroids or polyps etc then if you are post-menopausal the bleeding should eventually stop - after 6 months, but if you are still peri-menopausal then best to take it cyclically and your bleeds will be predictable.
If you really want no bleed then the Mirena is your best bet - but once you reach or near menopause, if you are not also taking oestrogen then it can leading to overthinning of the womb and potentially ulceration and spotting/bleeding, not to mention progestogenic side effects.
If you can tell us a bit more then we can help further.
Hurdity x