You said that when you had high cortisol state you had no fear, a lot of energy and libido. My question is were you taken HC or prednisone that time?
I think everybody with adrenal fatigue the body try to produce cortisol and in the night is a little bit higher but now I think my cortisol at night is low too because it's not hard to sleep but is not recovery either.
About thyroid I read a lot and many people think they need T4, T3 etc but they need to correct their adrenal when their adrenal is fine their TSH and other thyroid hormones are fine too.