I hurt my back the middle it hurts a lot i can walk i can't run hurts sleeping andwhen i sit started to hurt thur at work i was in the er room fri?

Back pain: This is the most common physical pain. Depending upon the damage, it can be a sprain of back muscles or ligaments, or a disc malposition or a fracture of a vertebra. Presumably the er sorted these out for you and gave you instructions and a diagnosis. Ice is almost always helpful and try to protect the back from painful motion. Physical therapy can help. Not chiropractic.