Hi, sorry you're feeling overwhelmed 
I've been thinking a lot about burnout recently myself. I agree with the others about insomnia, perimenopause may be a cause. But also life is loooong (if we are lucky) and ups and downs come.
However I personally go into a short period of hibernation and self-care when it all gets a bit much. I do only the essential jobs, reduce social events and focus on activities that are enjoyable/soothing (for me that is walking, crafting, cooking, playing games).
I write a plan for my time off, I try to slow down, I try to remember that life is not a competition or a test. I basically put myself on a retreat at home.
For someone more extrovert than me, they might prefer to swap crafting for meeting friends - you have to know what energises you. If you don't know, experiment and have a think about how you feel afterwards.
I think the world is full of burnt out people, after covid - you are not alone.