childhood self-punishment?

hi all! i wasn't sure what to title this thread.

so, i've had anxiety pretty much since i was born, according to my mom, and i've been formally diagnosed with generalized anxiety disorder for a really long time, but i don't have many memories of my childhood (which i suspect to be from constant anxiety, which causes stress, which would cause my memories to not have encoded properly).

also according to my mom, i've been punishing myself since i was a kid? she says that if i ever thought i broke a rule, she wouldn't even get a chance to punish me because i would have already put whatever toys i had away, and go sit in the corner and put myself in time out, and even when she tried to convince me i hadn't done anything, i would stay there. i'm curious as to what this might be? like, i have no memories of it, so i have no clue what my motivations would have been, or what i thought i'd accomplish. does anyone have any ideas ?