Hello Abba Fan, peri and Dancinggirl,
Thank you so much for taking the time to respond to my question.
peri - I also had no libido when I had the mirena in my 30's (I would much rather have had a cup of tea!), but since I don't seem to have much of one now I'm not so concerned about that aspect of it. I am slightly concerned about the low mood though, because I have definitely become slightly moody and grumpy since starting the hrt.
Abba Fan and Dancinggirl, I'm really glad to hear it has worked for some people. I have friends and family who swear by mirena - my dearest friend was too saved from a hysterectomy by mirena, and my eldest daughter, who also has endometriosis, has found that despite some drawbacks, it has been of overall benefit.
I think I'll just have to give it a go and see. My GP did say it wouldn't be a problem removing it quickly if I had problems with it again.
Thanks again for your helpful comments, and fingers crossed!
Hothothot x