I am so sorry you injuries have worsened. Good advice to always find someone to go with you!!!
Along with the advice to write/ talk to the nurse manager I would also cc the top administrator. Depending on how po'd you are, I would consider a report to either JCAHO or local agency. I would also make it clear that I refuse to pay for the additional x-rays and CT scan (I would also advise my insurance company not to pay). They were not medically indicated according to your complaints.
Hope you start to feel better soon.