I have had burning pain from back injuries, as well as severe pain from a dislocated rib caused by severe coughing. The rib was fixed by my chiropractor in just a couple visits. A chiropractor can also fix subluxations in the spine that could pinch nerves. Pulled muscles also will "burn" at times and those take awhile to heal-try alternating ice and heat. I'd recommend seeing your chiropractor if you have one or find one that your friends recommend.
I hope you can get the pain resolved quickly. I know how terrible it feels. Prayers for you