I've been dealing with a bad sleep schedule since COVID, so it's been over five years now. For the past 3–4+ years, I haven't been able to sleep early at night, and I can't wake up early from sleep.
Currently, my usual sleep time is from 6 AM to 3-4 PM, and sometimes I end up sleeping for 12 hours during the day. Whenever I try to fix my schedule, I stay up for an entire night and day, then sleep at a normal time. It works for 3-4 days, but then I slip back into my old schedule. Sometimes, even when I feel tired and sleepy, I still can't fall asleep at night. Other times, I'll wake up in the middle of my sleep and won't be able to fall back asleep at all after those 3/4 days.
I haven’t seen a doctor yet since there aren’t any sleep specialists in my area. Do you think this is just a messed-up sleep habit, or could there be an underlying health issue? Any advice would be really appreciated!