Chest pain and back pain when deep breathing and movement my upper body?

Tricky: We must distinguish between pain only when taking a deep breath or cough (pleurisy), deep breath lying down but not sitting up (pericarditis) and primarily with movement of the upper body (muscular or arthritic). A recent or current viral illness could suggest the first 2. If reproducible with movement, the last is suggested. You might want to consult your family doctor.

Muscle strain: Could be that you have muscle or tendon injury from overuse. Try some antiinflammatory medication and if it persisits see your doctor.