I have a coil and progesterone pill. I have not had a period since I had it. The odd spotting when I just had the coil but nothing with both combined.
I have the mirena coil, it hurt for a while when I first got it, nothing compared with endo pain, but it stopped everything from working. I kept developing cysts so they suggested the coil, it wasn't enough to stop them on its own but combined with noristhesterone and provera it is the only combination that has stopped cysts. It did help the pain to start with but only for about 6 months for me. The pain is now back and almost constant but I have it quite severely and I think the problem is the severity of my endo and the meds just don't come close to helping.
It depends what you are going on it for. If it's pain I personally haven't found it much help but for me it was stopping, or slowing down cyst growth which it has done so it has been worth it.
I wouldn't rule out the coil, I was sceptical but it has been good. I never feel it and am so much better on it that I was with any combined pill. I have had a few burst cysts so didn't find insertion painful - I know a lot of women say it is agony when they insert it. It certainly isn't nice but it's not that bad at all. I would rather have a coil fitted than endo!!
I also find progesterone pills do not make you as depressed, they don't make your boobs painful or bigger either. I am much happier on them and have much more energy. Everyone is different but I would say over all progesterone is better for me.
I am not sure if it is the progesterone pill and the coil that is doing it but recently I have found that as my period have been stopped for so long my body is constantly "trying" to carry on naturally so I think this is what is causing my constant pain. It seems to be worse in the intervals I do not take the progesterone pill so it may be worth really checking the dosage levels with your doctor before you start taking it if you are worried. If your endo isn't severe don't rule out the coil it really is a good option.
If you have any questions do message me if you want more intimate details or have any questions.