I would make sure your nutrition is up to par for a person who suffered a severe concussion. Your brain needs extra nutrients to heal and just get to a normal state.

I need extra B vitamins, especially B-6 and B-12. Treat your brain like it is under stress. The vitamin industry has already marketed products for stress. You probably need twice the amount they recommend.

Have you had any blood work done?

B-12
Folate
T3
T4
TSH
Hormones, including DHEA

all can be brain stress and tiredness related

As a brain injury survivor, you will need to always keep your nutrition up so you brain can function properly.

Hope this helps.

It will take a while for nutritional changes to improve your condition, so get going.