SORRY FOR LONG POST!
Yes, I understand where you're coming from with all this - i'm trying to understand what different hormones do and what is the best way to get my hormones balanced in a way that will relieve symptoms and prevent regrowth. My endemetrioma was 9cm, so quite big, but I do not have adenomyosis (I had an MRI and as far as I understand it, it would have been picked up then - I may be wrong, not totally sure about that).
What I've read about the Mirena is that for some it works wonders; for other it causes terrible pain for 6 months or more, and then after that works wonders; and for others it creates terrible pain and it continues that way and never improves. So it's something of a gamble.
When it comes to the combined pill, isn't the oestrogen created by ovulation more powerful than that found in contraceptive pills, and the effect of not ovulating for months will overall lower your oestrogen levels (in particular oestradiol) despite the fact that you are taking oestrogen? I think that's the idea (anyone who wants to correct or amend what I'm saying, please feel free!). Elsewhere I have read that it's not so much that oestrogen is the problem, but the balance of oestrogen and progesterone; Endo suffers may lack progesterone, so progesterone cream or pills are what is needed. I would really like to have my hormones tested to understand what is lacking/what levels are too high, but there are numerous difficulties with that, as the NHS do not really take this approach, so to get a test you have to go via a naturopath and pay around £70. I don't know how much I trust private companies doing lab tests by post (btw there are threads on healthunlocked regarding hormone tests for eostrogen, cortisol etc).
It seems clear to me that hormonal balance is key to what is causing my health problems, and I wish experimenting on myself by trying one pill/coil and then another and another and hoping one works (whilst accumulating various side effects as I go) wasn't the only answer.
I have been on both Femodene (horrible emotional side effects and depression) and Microgynon (reduced period pain and heaviness a little, caused mood swings and hyperpigmentation; after about 3 years the pains and heaviness returned as before). Those are both combined pills.
Well, I feel like I've thrown a lot more confusing elements in the mix, but no answers as such...sorry about that.