Am not doing well because of my brain shutting down

I posted yesterday about brain not working or forgetting how to do things

Have been stuck in a vicious spell of it for over a day now

Continually mentally spiralling with shame and self worth and feelings are getting out of hand

I can't do anything right I hate myself my brain won't work why can't I do things why can't I learn or remember things, why am I so useless and broken and am embarrassment

Why me

Someone please tell me how to fix this because I don't want to keep living this way and mentally am spiralling into a very permanent solution