As per x ray, there are degenerative changes in cervical spine alongwith Wedge compression of C5 vertebra. There is a possibility of nerve compression due to this which may be causing the trouble. Was there any inuury recently.
Next Steps
I will suggest you to get one MRI of Cervical spine. Use a soft cervical collar for support.. Take Analgesic with muscle relaxant medicine..
Health Tips
Avoid heavy work, avoid forward bending, avoid jerky movements of neck