If you are waking up/sitting up 10 times during your sleep, you aren't getting restful sleep. That alone could account for your fatigue.
Has anyone tested your testosterone levels? https://www.healthline.com/health/low-testosterone/warning-signs
What about your thyroid? If they only did your TSH, they haven't really tested your thyroid.
Hello~I am sorry you are having all these miserable issues. Have they tested you for Chronic Fatigue Syndrome? Some of your symptoms point in that direction, also, thyroid malfunction, either high or low. You need the complete panel, not just one, isolated test.
I hope you feel better soon.
This article provides an overview of fatigue: https://www.aafp.org/afp/2008/1115/p1173.html
"my blood pressure isn't usually up when my face is red and flush"
If you are saying that your BP during a flushing episode is lower than usual, then I'd look at histamine (and other vasodilators) from the immune cells called 'Mast Cells'.
This article is in the top journal for Immunologists/Allergists:
"Mast Cell Disorders: Protean Manifestations and Treatment Responses" 2017
(protean = extremely variety symptoms, which is what you have)
About MCs, there is also this:
"Sleep apnea, almost always obstructive, is found in 15% of MCAS patients and curiously occurs not uncommonly in non-obese patients..."
You must have wondered why you have obstructive apnea when you don't have the most common risk factor of being overweight, right?
"I'm just falling on my face tired even after 10-12 hours of sleep and I'm not convinced it is the sleep apnea"
Fatigue, malaise and unrefreshing sleep are very common in Mast Cell disorders.