Hi KATE
Hope this message finds you in good health.
I have gone through your complaints and understand your concern.
the pain might be from 2 causes.
1.
nerve compression in neck causing the pain to radiate down the chest region
2. local shoulder
soft tissue swelling causing the part to get inflmmed.
to find out the exact reason,do get an xray and
mri done of shoulder and neck.
hot fomentation,
analgesic,anti inflammatory drugs should help.
if the nerve is compressed in neck,u may need cervical traction and
physiotherapy.
Nothing to worry about.
I hope your question has been answered.
If you have any follow-up queries,feel free to consult me anytime.
Thanks,Take care,God bless.