I have the exact same symptoms regarding brain fog and tingling.

When I don't have the brain fog or tingling I am able to think clearly (i.e. 99% of what I used to be). However if I exert myself in any way, usually physically, I feel a strange tingling feeling in the left side of my head followed immediately by the brain fog. The tingling becomes quite prominent when I do physical work (even move), concentrate, or speak. Unfortunately it makes speaking very difficult for me and people at work have noticed. This fuzzy state lasts for 24-48 hours then, if I am mostly still, I am almost back to normal. I suppose this means that the condition might be temporary.

I have experienced this for almost 2 years now and I'm afraid to admit it is becoming worse.

Physical and cognitive rest do not appear to help.

It is extremely unlikely there will be a 'magic cure' to this problem either and, to be honest, reading these forums has only increased my anxiety.

Whilst taking time off work may promote recovery, this is not a practical solution unless we all start a personal fundraising enterprise. The majority of my colleagues suffer from standard headaches and, in the real world, we can't all just indefinitely take off work because of this.

My only suggestion is to accept the way things are for the time being (which is extremely upsetting I know) and keep trying to get rest and recover, however long that might take. Years in my case.

Stay strong.