Nicola,
I have some of the same symptoms. dark circles under my eyes, low energy, very thin (except my butt, lol), low drive in general, trouble sleeping...
Are you taking cortef or DHEA? How long before the dark circles started go and you energy improved? Sometimes I feel like everything would be fine if I could just sleep 8 hours straight every night. I feel so good when I do that.

chigirl