This is exactly how I feel.

About 1 1/2 years ago I experienced a moment where all my regrets from my entire life flashed into my brain one after another all in a matter of one minute (or less). It made me feel like the most terrible person on the face of Earth. It caused major unrest, depression and the feeling that I would be called out on everything I had done wrong. It scared the hell out of me.
I have no idea what triggered it.