I’ve been feeling very similar feelings. My energy went off the edge of a cliff recently with such a degree of tiredness that at times I can barely keep my eyes open. I’m experiencing a full-body tiredness, not just mental, so it could be something else.
But yes I’ve recently had this sense of just wanting to give up, also feeling angry and frustrated too. There’s also a feeling of ‘what’s the point of living?’ But not in a suicidal way, just the thoughts and feelings of that. This is the opposite to how I have been feeling, despite some pretty massive challenges I’ve been dealing with so this was a sign I probably should have noticed in hindsight.

One other sign I should have recognised was old buried memories suddenly coming to the surface and playing out in my mind. I know this as tall white interference from past experience but it’s so subtle, I just didn’t clock it this time.

And I also feel ‘off’ too, very similar to how you’ve described.

Thanks for the reflections 💕