welcome to hcm, i really appreciate your concern, Without being able to examine you, it is hard to say, but any time pain is intense, I recommend you go in to be seen and likely will need to have an Xray. It is possible, given the history of lower right side back injury that it has affected the upper right as well, due to compensation, or actual damage to the upper right musculoskeletal area. It may a bone fracture causing a damage to pleura. which may have cause tension pneumothorax where in your lung will start collapsing as you need to insert the tubes to remove this from pleura. The only way to know is to go in and be examined. Sometimes with osteopenia or osteoporosis, an X-ray may not be able to show a fracture for a couple of weeks, but is worth getting anyway if any of the bones are tender. Depending on what is going on, you may need physical therapy. You can try some hot (not too hot that it will burn your skin) compresses on your upper back if there is muscle cramping. But please do go in and see a doctor for evaluation in person for this. please let me know if you have any further queries. thanks. regards