Sorry to hear about your divorce. I found the brain fog to be one of the worst factors in day to day life, especially with work. Thoughts of "did I miss this bug because of brain fog or was this something anyone would have missed" often run through my mind. Its hard to get people that havent experienced anything like this to really understand and the self doubt can cause a lot of stress. Sometimes its akin to early signs of dementia.
I cant offer much support but youre not alone in suffering this