Total Loss of Libido. Help?

And again, it’s not.

For one very simple reason: saliva production and flow rates are immensely different between individuals and situations and can range from 0.1 ml per minute up to 1 ml per minute.
So your cortisol per ml saliva can vary 10 fold just depending on your saliva production rate.

Dehydrated and anxious-> no saliva flow: Oh your cortisol is high - you are stressed out!
Hydrated and smell of good food → lots of saliva: Oh your cortisol is low - you have adrenal fatigue!

It’s a completely useless test and this has been shown several times in actual scientific studies. It’s not an opinion it’s a fact.