Thanks for posting your query.
First, i would like to mention that high ESR
usually refers to infection in the body. As you are suffering from throat pain and your xray chest is normal, then the pain may be due to throat infection
. Ideally you need to get a throat swab culture done and antibiotics have to be taken accordingly along with pain killers.
The infection in throat can also lead to pain and swelling in the lymphnodes
For pain in neck including the area where neck and shoulder connects, it can be due to muscle tension, which can be releived by hot foamentation, physiotherapy
as well as local analgesic
Hope you feel better soon.