Yes Pippa, I'd wondered that before.
When the bloods were done, I wasn't on the desogestrel POP. The desogestrel POP keeps estrogen levels (from your ovaries) within the early follicular stage. So I'd have thought whatever estrogen I was producing would have reduced when I went back on the desogestrel. So if anything I'd expect my blood result to be worse/lower now, not better.
It's all a bit confusing. Now I am off the desogestrel again - and I'm on double the utrogestan instead. I've no idea what that is going to do in terms of controlling my ovaries... Does double utrogestan prevent ovulation? I've tried googling this and there doesn't seem to be anything about it. For endo prevention, it would ideally stop ovulation and keep the ovaries quiet. If it's not going to do that, it might not work for the endo and I might have to go back on desogestrel until menopause.
And then, when I was 21 and went on the combined pill, I had the same symptoms I have now. What does the combined pill do in terms of the estrogen produced by your ovaries? Do you just get the estrogen in the pill and none from your ovaries or both?! I don't know... it's all very confusing.