I second Eowyn's comment about finding a physiatrist, especially if you can find one who truly understand concussions. They are commonly listed under Physical Medicine and Rehabilitation in the yellow pages.

I also found at least 3 concussion clinics in Durham, Duke, etc. I would not recommend the functional neurologist / chiropractic neurologist in Durham until you have tried the other options.

It is not uncommon for children and youth who have had a concussion to be told no screens at all. This is because they often struggle to follow a limited screen time protocol.