Thank you @colely for mentioning POCD.

I learn something new every day. I had never heard of POCD , so did some reading.
This page does good job explaining:
https://sunnybrook.ca/research/content/?page=anesthesia-brain-health-education-pocd
@lollypop9 , if it is in fact POCD, it can resolve itself without any treatment. Most patients’ brain function return to baseline (before surgery) within a few months following hospital discharge.