Thank you for posting your query.
First of all, I would like to reassure you that your symptoms do not suggest any serious head injury
It is fairly common to have dizziness
after mild head injuries, which tends to get aggravated with change of head position and movements of body.
This is self limiting in nature and subsides on it own in a few days. If the dizziness is very troublesome, you could take betahistine
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad