I would not be overly concerned about sugar in normal foods. Just reduce the highly sweetened foods such as desserts. Small servings of sugary foods, 150 to 200 calories max should not be a big problem, especially if you combine them with more complex foods, protein, etc.

I suggest you find some B-12, and D3 at a minimum to add to your regimen. The top brands are not much better than most brands so I would not get too concerned about needing top quality brands.

If you tolerate the movies without causing fatigue, that stimulation may be OK. I need to use head phones for the audio or I will strain to understand the dialogue. Head phones greatly reduce the energy needed to watch TV for me.

You should find someone to check out your neck for a subtle neck injury. It does not take much neck inflammation to increase concussion symptoms. You may not feel any neck stiffness but still have a subtle neck injury causing problems. Good head and neck posture during rest and sleep is also important.

My best to you.