@macferse Here is an article that explains a bit more re. your adrenals. You should be able to find a lot on-line. I just read an article that suggests adrenal issues might not show up until you get lower than 7 mgs. (maybe 3-4), but there's a range and we're all different (which is why you won't find many difinitve answers).
https://healthunlocked.com/pmrgcauk/posts/private/146749826/reducing-steroids-activating-the-adrenal-glands