I had a Cortisol AM/PM test done yesterday. I got the PM results this morning, and at 4PM they were at 6. Does anyone know what the optimal level is? Should it be going higher as the day goes on? I'm still waiting on my AM test. They did it at 11AM, so they might say its not valid. I tried to explain that it would be extremely difficult for me to get to the lab so early in the morning because my symptoms are worst in the morning.