Your waking in the night may contribute to fatigue.
I am still very much trying to get an handle on it, but what seems to happen...
The fatigue, is more a lack of stamina. My energy, just runs out and it is quite unpredictable. I can be sat in the living room, watching TV, decide to get up and deal with a chore, part way through, just a few minutes in, my energy can run out, and I'll need to sit until I recover and can carry on. My legs just turn to jelly.
Other times, like this morning, an easy pottering task, I managed without needing to rest at all.
Walk the slight 100 yards uphill, to the bus stop, I will need to stop and rest, maybe two or three times, then plonk myself down for a few minutes to recover. Once recovered, I can stand and feel absolutely fine.
Do you get accused of snoring?
Often.
It may be worth doing a Epworth test.
Epworth-Sleepiness-Scale.pdf https://share.google/7kfKebWUEXERLaquR
All zero there. The only times I might doze briefly, is if I've woken up in the night, decided sleep wasn't going to return, and so got up, and missed a few hours of sleep - where I would deliberately allow myself to doze, during the day. I need and normally take my full 8 hours. Come bed time, bedroom TV goes on, I might manage a few minutes watching, but not usually long before I'm in the land of nod, confirmed by Avril. She is one, who can manage on little sleep.

