You are absolutely not alone. As various factors rise & fall, sometimes they stack up and I just lose hard for a day. Do what you can to be nice to yourself on those days. Beating yourself up for not functioning "normally" is like mocking a quadroplegic for not walking with proper posture. Days like that I try to make time to do something slightly creative with no end goal, like record some bass lines then delete them. The required solitude is an amazing treat (if you can get it), the creative outlet feels like finally letting go of a fart you've been holding in public all day, and the final deletion keeps anything from having any pressure to be good enough.
You are absolutely not alone. As various factors rise & fall, sometimes they stack up and I just lose hard for a day. Do what you can to be nice to yourself on those days. Beating yourself up for not functioning "normally" is like mocking a quadroplegic for not walking with proper posture. Days like that I try to make time to do something slightly creative with no end goal, like record some bass lines then delete them. The required solitude is an amazing treat (if you can get it), the creative outlet feels like finally letting go of a fart you've been holding in public all day, and the final deletion keeps anything from having any pressure to be good enough.