welcome to health care magic,
from the description of your symptoms you are suffering from post concussion syndrome
wich is complex set of neuropsychological disorders with symptoms lasting weeks,months or years after initial injury.
the symptoms include
-sensitivity to light and noise
- balance problems
- blurred vision
- mental dullness
- mood swings
- memory loss
treatment is mainly rest psychotherapy
and medications like painkillers,antidepressants.
hope to answered your query
wish you a quick recovery.