Greetings, sorry about the pain. Your pain seems to be due to poor muscle imbalances at neck and shoulders. Nothing to be worried.
Next Steps
get to see a physio with knowledge about trigger point therapy and posture correction and in 2 weeks time 40% of your problem is solved. following exercise recommended by physio to correct muscle imbalances will cure the remaining 60% of pain in 2 months time. this is the time taken to strengthen your neck and shoulder muscles. until 2 months follow up with physio to see full results.
Health Tips
if for various reasons you couldn't get results do let me know will treat you.