The depokote will indeed cause fatigue. Stress and anxiety will normally show in the sternum area of your front chest. The burning in your back since your not a smoker would reduce the chance for lung cancer. Thus the request for info. You may very well have a Neurological problem within your back that needs to be checked by a Neurologist instead of your primary. An orthopedic MD would also be able to see you on this. If you have not had a full chest x-ray recently then please do have one to rule out any problems there. Anxiety will cause lower back pain but rare for upper back. The tingling sensation is indicative of a nerve. Thus the suggestions of seeing the two types of doctors.
If I may be of further assistance please reply. I will be glad to further assist you.
Medical Forensics
Forensics Medical Forensics