I am late here. If wall too long it's ok. Just please don't stop drilling the topic it's super helpful and important.

My dad with diagnosed apnea and long memory deficit.

Until highschool i was always skinny, always with memory and focus problems, moments of thoughtlessness/void, continues stress at school despite decent grades (repeat until win grinding), a bit mental breakdown before high school exams.
After runs at school always had the black-white stars before eyes.

Always loved bread.. donuts.. since university beer (once nearly lost consciousness out of nothing). Half of family with metabolic diseases or dead for it, so I consider digesting carbs a mortal sin now. I totally cheat drinking milk (lactose).

But then i always slept well, like hard rock well and even for 10-11h.. just thinking was clouded and harder concepts couldn't fit in my RAM memory.

Now at 36yo, some time after reducing weight to 66kg(175cm) from 77kg+ progressively discovering keto and intermittent fasting i noticed physiological changes.

For starters I never get sick now except small headache if I go to sleep excited past 22:00...

Sudden brain clarity was a huge surprise but started feeling more alert at all times and sleeping stiff, like in a constant threatened state (luckly not remembering any dreams)

Also I think it stiffens my scalp causing baldening. Blood pressure in high end of norm but once lower. Sedentary lifestyle I assume.
Watching screen most of day probably also doesn't help.

I was mixing morning fasting, coffee and cold shower what I discovered to be refreshing, energising but a total overkill, shocking body that's not liking it.

I also had an episode when working physically abroad with osteoporosis like symptomes, other level painfull wrists, stiff clawed fingers after waking up that required stretching to straighten to normal. I decided it eventually as a result of overdose of histamine (cacao, tomato, aged cheese, sugary foods, beer and what not from list).

I still have a bit irrational trouble to force myself to do stuff. But when I start doing something I can do it for hours, actually I forget to do other things then. Old habit at this point.

Overall I react to stress much better now.

My mom has the same histamine sensitivity plus reflux (more pyroli and crap diet related - but guess what ppl in one household eventually share bacteria too).

i fixed it with identifying every histamine related thing that hates me most and instead of taking quercetin (not including natural in garlic, onion) i discovered 4 antihistamine bacteria strains mix that regulated by gut effectively and zeolite. Now diet with mainly meat and eggs isn't any problem (at least not in periods of controlled oxalates dumping)

In my case after a bad sleep night coffee adds salt to injury for sure.

But i implemented nearly full huberman sleep protocol, fully blackened room at night, watching daylight after waking up and started taping mouth too. Winding room before sleep and breathing deeply for sure makes a difference. Ionisation of air to bring all dust down too.

Meditation, NSDR and buteyko method also helps relax this unconsciously stressed body very well. The same as morning exercise, just 5 min HIIT, nothing crazy.

I few times through life I felt my heart skipping a bit or short intense burn pain out of nowhere. But never diagnosed it. Worked physically without any problems.

But I added to my routine push ups sets like once a week, progressing weights and its like 33kg now..

Once a bee stinged me right above right eye, minimally reshaping eye, what was enough to cause worse dry eye effects in this one.

The point is I can't sleep on back (it's perfect for relaxation though) but when laying on right side of the eye it veins redden more while when sleeping on left, heart side i'm feeling like pressing it too much.

I'm dumb about tackling this one.

I also manipulated my bed... exactly the wrong way... sleeping opposite... Today I'm reorienting.

Can't throw carpet away but definitely gonna clean the room totmax.

Also am using pillows as with slimmer legs sticking legs together feels unnatural and not properly in parallel. Or I'm getting autistic/neurotic overthinking every detail

Don't stop the topic!

And write in more detail what you do now. There may be more to your solution than what's mentioned here.