Yeah I have that too. It's called HPTA dysfunction. (Don't bother asking your regular PCP) It simply means your pituitary/hypothalamus doesn't put out the necessary signals for the various organs to make the proper amount of hormones. Many people here have varying stages of this. Sometimes the cause was a very minor or serious head injury or just a concussion. Lots of football players have this problem too except they call it TBI (tramatic brain injury) they now fix this problem with hormones...google it.