@bentstiks2, I, too, was a Type A go-getter like your husband, then came Long Covid in early 2021. After 4-1/2 years of various doctors and finally treatment at a Long Covid clinic, I saw improvements in everything except brain fog, memory loss and anxiety. They tested me for the biomarker for Alzheimer's and I was positive. With an extensive family history of dementia, I wasn't surprised. I was tested twice this year and am negative, but was told symptoms of brain fog/memory loss and early dementia/Alzheimer's are similar. My anxiety symptoms are exactly those of CFS/PEM. I now see my neurologist every 6 months for review and though I don't have dementia, am taking Aricept for brain fog and memory loss. It has been noticably helpful. Perhaps biomarker testing would confirm or deny your suspicion of dementia with your husband. The most frustrating thing for me after 5-1/2 years of Long Covid has been not knowing what's wrong and how to treat it. I've learned more from Google, YouTube, and this forum than from my doctors. Wishing you the best for resolving your husband's issues. It's a struggle, but many of us are right there with you.