Without reading your post, I looked at your test results and being higher at night than in the morning was just like me and I had Cushing's.
It is unusual to have low BP but I had it as well. The doc needs to be checking your renin and aldosterone. As these hormones are very poorly understood you really need an expert to diagnose you as you may have a couple of issues going on.
Has the doctor told you about salt? I need loads of salt to keep my BP near normal. I would discuss this with your doc. I also take a med to help me hold sodium, the aldosterone replacement.
You may have cyclical Cushing's.
I am not sure about reactive glycemia. I can only talk about my own experience as a patient.