I too have the same problem with adrenals too active at night/not active enough in the morning, but my blood test wasn't abnormal enough for the doctors to do anything about it. One thing I do notice, however, is that if I am on the computer in the evening, I have a more difficult time getting to sleep that night. Probably something to do with EMF sensitivity, or over-stimulation of my brain (because before I stopped working, my job was computer-related)...
I have had supplements prevent me from sleeping. Specifically, B Vitamins, Potassium, and Vitamin D.
Adrenal glands need Vitamin B5 (pantothenic acid) and Vitamin C. You might try taking this combination early in the day and see if it helps.
Also, Nutmeg essential oil is supposed to balance adrenal hormones, so that may help too. I'm sure there are other herbs/etc. that balance adrenal hormones too. The biggest thing to remember though is that none of these treatments will start working immediately - it takes time for the hormones to balance, and for the influence of that balance to affect other parts of the body (such as the sleep/wake cycle). Don't try something for one or two days and give up, persist with the trial for a few weeks before deciding something is or isn't working.
Chronic Lyme Disease, Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, Anemia, Lymphopenia, intermittant Pancytopenia, chronic malabsorption/malnutrition, etc.; G-J Tube; Currently TPN-dependent.
Meds: Zofran, Pulmicort, Vitamin B12 Shots, Heparin (to flush PICC line).