This could be beginning of alzheimer's. Alzheimer's, like balding, is too often put away like an unpleasant thought until it's really too late to do anything about it. There is an obvious advice here of going to a good doc and having your lifestyle in order, but barring that there really is no sufficiently good treatment yet which is validated by large clinical trials.

But as a last resort, I'd check these papers and search for a doctor or an acquaintance who could help you make sense of the current cutting-edge research and possibly apply it for your case:

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4221920/

https://onlinelibrary.wiley.com/doi/full/10.1111/acel.13296

https://www.nature.com/articles/s41593-019-0372-9

https://www.nature.com/articles/s41467-021-22370-2

https://www.sciencedirect.com/science/article/pii/S235239641...

https://onlinelibrary.wiley.com/doi/abs/10.1002/med.21702

https://news.ycombinator.com/item?id=21728830

https://academic.oup.com/advances/article/7/5/905/4616724

https://www.fightaging.org/archives/2020/07/chronic-neurovas...

https://www.fightaging.org/archives/2018/09/an-inflammatory-...

https://forum.age-reversal.net/t/h4b2b5/a-spreadsheet-for-ca...

Do not go gentle into that good night.