At your age, spondylosis i.e. Age related wear and tear of the bones of the spine should not happen. If the pain in the left side is recent onset then it's a red flag and you need to see a Neuro/spine surgeon. Need to have a more elaborated symptom history and physical examination to localise your problem.
Next Steps
Take rest. Do neck stretching exercises.
if no relief, see a Neuro/spine surgeon.
Health Tips
Don't lift heavy objects like luggage, full water bucket etc. Avoid traveling and riding bike.