Hello Good evening,
As per your description things are indicated that you should go for a CT scan
to rule out Chronic Subdural Hematoma(SDH)/Extradural Hematoma (EDH), which can be occurred by such type of head injury
More likely you will get a definite diagnosis by a CT scan, which is very needful is this case.
After diagnosis it will be very easy to track a line of management.
So go for a CT Scan Head followed by Neurosurgeon's opinion.