Thank you so much for checking in Peter. I'm sorry that life is so difficult for you and you suffer so much. Everyday must be such a challenge
I have gone through neuropsych testing twice myself (mainly for MS). It can give you a lot of insight, but it has it's limitations. Expect to find out about your strengths and weaknesses, the areas of the brain and functions that are impacted, and the neuropsychologist's idea of what cause(s) are contributing to your limitations. They will make recommendations to help you capitalize on your strengths and adapt to or work on your limitations. Your doctor may or may not find the report useful in your treatment. Mine did not, either time, but that is my individual experience. They continue to do neuropsych testing because it is beneficial to so many people.
I hope that the testing proves useful to you in finding successful treatment and a happier life. You deserve it.
You are a strong man, keep fighting
Kay