Hello and welcome to PC.

I'm sorry you have so much to cope with at the moment, it sounds as if you have overcome a lot of obstacles in your life so far, but even the strongest can feel overwhelmed and exhausted.

A thought about the fatigue, I live with fatigue, so have done some research on the subject.
A common problem is that people with fatigue often sleep longer because they're so tired. It's a logical thing to do, but often makes you more tired. there is some research in the uk that shows that restricting sleep to an age appropriate length of time and avoiding daytime naps longer than 20 to 30 minutes improves energy levels in the long term.

The reason is, that the more hours you sleep, the less hours you get of deep, good quality sleep thus, longer sleeping leads to less refreshing sleep.

It's not the whole answer, and it is hard to do, but slowly reducing the length of time you spend in bed at night ("pacing down your length of sleep") will, in the longer term help the quality of your sleep, especially the research was in younger people.

This is a thought, not a prescription, but I find that adhering to a regular time to go to bed and rise in the morning within an hour at either end of the night, aiming for 7 to 8 hours sleep time and a little time to settle does help the quality of my sleep overall. I also resist a long sleep in the day.

You may be interested to google "sleep hygiene"

I'm aware this may not be your biggest issue and I wish you all the best with those too.

This is a great place to come for support so I urge you to keep posting and people will reply who understand something of your issues and want to support you.