Your pain could be due to neck muscle spasm or cervical spondylosis or cervical disc lesion.
Next Steps
You should give hot water fomentation for your neck twice a day for 15-20 minutes.
You can use Volini gel or spray provided you are not allergic.
You should do neck stretching and strengthening exercises with proper guidance.
Avoid using high pillow.
Avoid driving for a week.
Avoid lying on the affected side and on your stomach.
Avoid prolonged neck bending activities.
Need to get corrected with your posture.
Health Tips
If the pain persists or aggrevates you need to consult a Physiotherapist or Orthopaedist for further evaluation and treatment either in person or through video call.