Hello and Welcome to ‘Ask A Doctor’ service. 
I have reviewed your query and here is my advice. 
Probably you have a neuromuscular problem of the neck.
It might be caused from a 
herniated disc of cervical column, this is a very common condition. 
You can take 
ibuprofen 400 mg three times a day for some days to relieve pain, 
-you can also consider  using 
cold ice packs, 
-practice keeping a good posture of neck, 
-learn different exercices, 
-you can try slight neck stretching
Hope I have answered your query. 
Let me know if I can assist you further.