I'd have trouble giving you specifics of what I did last week, for instance, and I'd be lucky if I could come up with more than one or two things from last month. Last year is a blur—I could come up with a handful of details, mostly anchored to holidays since it's easy to prompt myself with "I know Christmas happened, what did I do for that?" and the like. Forming parts of my life into any kind of narrative is incredibly challenging. I hated those "what did you do over the Summer?" writing prompts elementary school teachers love to give the first week back.
Maybe your situation is similar. I don't have a diagnosis or anything, but pretty sure I'm affected by this:
https://en.wikipedia.org/wiki/Overgeneral_autobiographical_m...