Since a few years, my memory became very fuzzy and bad, can barely remember anything i do especially after i sleep in which the brain seems to "reset" (like when you create a new save file)

I'm living on multiple notepads on my laptop/irl and trying my best to remember what i do through the day

Do i have a mental illness or brain damage? I have this since late puberty, before i never had this problem. I dont think its normal i always have a "nostalgia" feeling few days after watching something, used to happen after few years