I suggest you try some nutritional supplementation. Start with:
B-12 1000 mcgs daily
a B-50 complex
E
a high potency multi-vitamin like GNC Mega Woman (Centrum and One a Day are too weak)
Omega 3, 6, and 9 fish oil
Magnesium
Calcium
Good meat protein for amino acids

It is not uncommon for people to be B-12 deficient. It is needed for nerve recovery.

This helps the brain flush the toxins left by the injury. It takes a month or two to start to see improvement.

Quiet rest is the gold standard for allowing the brain to heal. Nutrition just helps the brain with this process.

Reduce and/or eliminate stress in the form of work stress/deadlines, emotional stress, visual and auditory stimulation, physical exertion, etc.

This is a start. If you have specific symptoms, we can address them, too.

My best to you.