Hi,
First of all your if we consider your pain upper back with numbness radiating down the arm- the common cause for this is cervical disc disease(neck related problems).
The symptoms could increase due to abnormal posture while sleeping or working or lifting heavy weights or trauma to the neck.
Other causes can be
brachial neuritis (swelling of the nerves),
vitamin deficiency, diabetes or even stress.
Similarly your burping and abdominal discomfort can be due to gastritis or reflux.
Persistent gastritis can even cause irritating cough. So I feel that first of all focus on your diet- good balanced diet, avoid spicy,oily food,avoid tea and coffee,take lots of fruits and vegetables and take care of your posture.
If still the symptoms persist then go for some investigations like
complete blood count,
vitamin b12,FBS,TSH,xray
cervical spine. Once the results are there, we can plan proper treatment.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr. Milinda Gupta