I understand this my T calls it cascading thoughts, and it stops me in my tracks.
everything seems overwhelming and I can't get started.

Some relief is to have a list of activities ( i use a morning list starting with get out of bed, make bed,... ) and often I could just my LIST, and not having to think has been enough to get started.

And days like today, I followed the list or as much as I could, and now I am going back to bed to 'reboot'.
I may sleep again and at some point I will say to myself the LIST, and start my day again.
Repeating as needed.

Gently1