Thoracic and Cervical Spine Strain due to lifting

Hi I sprained my back three months ago from lifting heavy items. Had an x-ray done recently...what exactly should I be looking for on that x-ray. Will the x-ray show anything or is an MRI better The areas that hurt is the cervical and thoracic spine. excruciating pain every single day, can't sit or stand for long periods of time, A massage helps but only for a while. Is this sprain permanent? What's the best way to treat and cure  this injury? Does Yoga, Therapy, Muscle relaxants help or just mask the pain?