Greetings, sorry about the pain. You seem to suffer from poor posture and overactive muscles. You didn't mention if you followed any exercise for neck or shoulders.
Next Steps
get to see a physio with knowledge about trigger point therapy, massage and posture correction and your problem will be solved under 2 weeks. if possible hire a physio as your trainer for 3-4 months to correct your posture plus overall fitness and you cam see remarkable recovery
Health Tips
if for various reasons unable to find solutions in 2 weeks of let me know will assist you. definitely a physio is the right person to help you, remember this and I am not baised in saying this.