No idea, but this is very similar to where I am right now. My mind is confused about everything around me, like it can’t get its head around anything.
Also, if I try to focus on anything, like my work, my mind basically shuts down, and I feel like I’m depressed. It’s like it just doesn’t have to capacity to do anything.
Hang in there, I know it’s tough.
If it helps, an extreme version of this, is the closest I have found to describe these feelings, as I struggle to describe them to anyone…
https://anxietynomore.co.uk/anxiety-mental-exhaustion/ there are a few things that resonate with me in here, and make me feel less crazy.