Why does causation of your brain fog and lack of concentration matter ? As I said, there is a big overlap of symptoms of PCS and depression, etc. A Neuro-Psych will at least quantify these issues. Whether the NPA points to a differentiation in causation between the PCS and mood disorder depends on the skills and biases of the NeuroPsych Dr. interpreting the results. Why do you need objective proof ?

Your symptoms could also be caused by your med cocktail. I see that lithium is cautioned when either or both of the other two meds are taken. Prozac can be a cause of struggles.

You can not compare outcomes after a concussion or even a number of concussions. Every concussion is different. Your brother's and sister's experiences are not relative. And yes, 80 to 90 % of concussions resolve. But, those concussions do not necessarily resolve 100%. In fact, studies show they do not. Under stress, it is not uncommon for symptoms to manifest years later.

I can also watch hours of TV and do strenuous activities without symptoms. Reading may cause me to fall asleep. But, my cognitive struggles have remained the same for more than a decade. My sensory struggles have improved slightly.