Didn't your candida infection get much worse when you started taking cortef? That is the warning I've constantly Heard. Because I've got the same problem too with my thyroid and adrenals but I can't do anything about it until I've sorted the candida problem - that's what all the doctors that I've spoken to says.
The problem is though that I'm not getting better. I also have the horrible rash problem which occur every time I'm Active or take showers or get any sort of die off.