24hr cortisol saliva test: what if you're an insomniac?

Hi everyone :)

It is highly likely I have adrenal insufficiency(in addition to Hashimoto's, hypothyroidism and estrogen dominance) as I check all the boxes and self tests (pupil dilation, blood pressure dropping quite radically when I stand from laying down).

I'm going to be taking the 24 hour cortisol saliva test in a few weeks. The problem is I'm an insomniac and never know when I'll be getting any sleep or how many hours it will be. As the test requires specific times at which saliva be taken, might my insomnia mitigate the accuracy of the results?

Thanks to anyone who can help.