Waking up exactly after 3-4 hours of sleep for 6+ months – tried everything, need advice (Asthma, Sinusitis, mild HOCM history)

i have a problem and I don’t know what the treatment is. I sleep for 3 hours or 4 hours and always wake up, even if, for example, I’ve been awake for two days and at the peak of extreme sleepiness.

As soon as I sleep, I sleep for 3 hours or 4 hours at most and wake up. I don’t know why. And I go back to sleep after I wake up, and again I sleep for exactly 3 hours, literally to the minute—3 hours no matter what time it is, evening or morning, and I wake up from sleep. This thing is bothering me a lot; I want to sleep for 6 or 8 hours continuously without waking up. I swear, I’m mentally exhausted and I don’t know what the explanation for this is!

I’ve tried everything that could possibly come to mind, from melatonin pills to antihistamine pills, to heavy exercise, to reducing caffeine and nicotine, to changing the surrounding environment, to changing my diet, reducing screen time, and everything, and it’s still the same situation.

This has been going on with me for more than 6 months now. I remember only one time, and I don’t know what its relation is to this, but I ate pieces of chicken wings—there were 8 pieces—and after eating them two hours later, I slept. That was the first time I slept for exactly 6 hours straight, a continuous and comfortable sleep, and I woke up in a really great mood.

My medical history: I’ve had asthma since I was young, sinusitis, and mild hypertrophic obstructive cardiomyopathy (HOCM) in the heart, but this history doesn’t have anything that would make me wake up from sleep like that.

I’ve measured my sleep pattern over several periods, and the REM sleep has never exceeded 15 minutes in the 3 or 4 hours that I sleep.

Can someone help me with what to do? Because I swear, this issue is chronic and affecting many things in my life, including my mood, the people around me, and my productivity.