Please help me understand my cortisol test results

Hi everyone,

So I did a 4 point saliva cortisol test through ZRT labs recently and got my results today. I am a 27 year old female who is currently working nights, but my schedule is regular in the sense that I pretty much wake up and go to bed at the same times every day (I just sleep during the day and work at nights).

Here are my test results:

Morning (I usually wake up around 6 P.M.) Result: 7.8 Range 3.7-9.5
Noon Result: 7.6 H Range 1.2-3.0
Evening Result: 2.1 H Range 0.6-1.9
Night Result 0.6 Range 0.4-1.0

Also, I had my DHEA-S levels tested via blood work and the result was 8.7 (Range 2.68-9.23)

My TSH is 3.97, FT4 is 18 (Range 12-22) and FT3 is 4.7 (Range 2.6-5.7)

So, my "noon" and "evening" cortisol levels are high, would this be contributing to my fatigue? How are my cortisol levels upon awakening? Why are my DHEA-S levels high? Do I have early stages of adrenal fatigue?

I also have symptoms of hypothyroidism, but do I need to address my adrenals first before I can start taking thyroid medication?

I would really appreciate any insight any of you may have and I look forward to reading your responses.

Thanks in advance!