I sleep 10 hours a night but still need to nap constantly during the day. Even 400 mg of caffeine doesn't buzz me, it just makes me feel 70% close to my normal, high energy 20s self. My daytime fatigue is so severe I've been mistaken for being drunk (even though I don't drink), and I experience a dream like brain fog around friends unless I use caffeine pills to seem present.
I know this is part of normal aging for a woman in her 30s, but it's frustrating to constantly need naps when I haven't even done anything. Sometimes you just have to biohack. Still, I feel a bit jealous of how men age differently and seem to keep loads of energy.
Male here, so might not be applicable: I felt like you described about a year ago. That was shortly before the big crash. I don't like the word burnout, but two naps per day, three to five cups of coffee and loads of sugar just to function is a good indicator your tanks are empty and you are running on fumes and stress alone. Its been a year and slowly reducing sugar and getting off caffeine for a month let me feel the deep tiredness again. I'm slowly gaining back the ability to even sleep through the night. If you can, reduce stress, keep sleeping as much as you can and cut off caffeine slowly. I stopped cold Turkey and it gave me a migrante so hard I nearly called an ambulance. What you describe is not normal and please take care of you.
Also way back in reddit times, there was a poster that had somediseases they only found because he started to nap constantly. I don't remember the details but I thought I might have that. 9 months of reduced work and stress and lots of sleep, I'm slowly coming back to my senses.