Comment by alok-g

Thanks for a detailed response! Sincerely appreciated.

>> Is your therapist a clinical psychologist or psychiatrist?

Yes. Clinical psychologist.

>> That would be an instant disqualification of an ADHD diagnosis.

You could be right. That's what most literature says. However, there's some talking about ADHD developing in adulthood. I cannot say whether to trust or not; surely there's very little such literature.

>> ... nor do I know the full extent/magnitude of your stresses

I have been shouted upon by my wife at peak volume for hours at a stretch, about once every two days, for years, with her usually beating herself badly along the way, sometimes threatening with knives, and so on and on.

As I wrote in another comment here, I started facing these symptoms around 2011 and distinctly in 2012, when I was 35 years of age. Prior to that, I have always been a star performer, during childhood and at work, with no such symptoms to the best of my understanding.

>> ... but have you ever investigated (C)PTSD? If can mimic many ADHD symptoms.

My therapist did mention that to me and told me to read about it. I read about it on Wikipedia, but do not know enough myself to say either way. I'll talk to the therapist again on my next visit.