Thanks for providing more information.
Sorry for late reply and inconvenience.
Firstly i understand your concern and as you describe possible cause may include concussion/post concussion syndrome.
Concussion is the sudden but short-lived loss of mental function that occurs after a blow or other injury to the head.
Symptoms of a concussion may not start right away; they may start days or weeks after the injury.
Symptoms may include a headache,nausea, ringing in your ears, dizziness,tiredness,Confusion or feeling as if in a fog,concentration and memory complaints,irritability and other personality changes.
You may feel dazed or not your normal self for several days or weeks after the injury.
It's good that your CT scan is fine.
And most of the cases of concussion,patients recover in few weeks.
If your symptoms are not improving over the time then in my opinion,a clinical examination by a neurologist should be considered in your case.
Proper rest,sound sleep,balanced diet can be very helpful.
Also avoid alcohol for a while.
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