Thanks for posting your query,
After going through your history you have blunt trauma
to head which caused no open cut or wound.
This type of trauma may cause impact injury
to ligaments and also neck muscles, and these muscles go in reactive spasm,and cause pain in movement and rarely when even some internal contusion
may be there.
So please see a Orthopedic surgeon and if necessary a radiological examination in the form of a
X ray Skull and Cervical spine
and/or CT Scan may be required.
You may need analgesics along with muscle relaxant
medicines and local application of analgesic gel may help and hot fomentaion may give some relief.
Get well soon.
Good luck to you