Some very interesting posts that may be confirming what you just proposed, this one in particular:
[ur]https://www.healingwell.com/community/default.aspx?f=30&m=1359474:
"I am waiting for adrenal tests through the above lab. My doctor suspects high cortisol at night due to some insomnia and the fact that I have the most energy then. He thinks my cortisol levels are flipped.
He recommended I take 2 capsules of Phosphatidylserine (PS-100) 2 hours before bed. It helps to lower high cortisol. It does not lower a cortisol level that is normal, however." From member: Kitty9309
There are some threads in my forum search that may also speak to this. You can find the search here:
/goo.gl/CIS4Yk