I have studied your case with diligence.
As per your symptom and history there is possibility of acute muscle spasm in neck with or without cervical disc.
Due to compression of this nerve root
there is pain associated with it.
For these symptoms muscle relaxant
with analgesic and neurotropic medication can be started consulting your treating doctor.
Till time take rest and continue analgesic available over the counter. Physiotherapy
and interferential therapy will give quick relief.
You may need to to MRI cervical spine
if symptoms persist.
I will advise to check your vit B12 and vit D3 level.
You need to take diet rich in calcium and vitamin D.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.