Also, if it's your upper back - it could be plueresy. Please see a doctor!
Peggy:
My mother has COPD. She is 66 and has suffered with this for many years. She's on 24/7 oxygen now. Yes, she experienced back pain and felt fatigued all the time. Have you spoken with your doctor about it? I would suggest speaking with your doctor as soon as possible. My mother was NOT treated properly for years and recently doctors wanted her to have a lung transplant but the government insurance says she's too old. So, no transplant. Please have it check ASAP!
And, yes, all of those things can cause depression. Perhaps your doctor can prescribe something to help you start feeling better?
Good luck!!!!