Can I sue my chiropractor or my current attorney if my condition has worsened?

I was rear-ended last year and followed my attorney’s advice. I didn’t have insurance so was treated through LOP (Lean of Payment. He sent me to a chiropractor, where I had treatment 3 times a week. I went to the emergency room a week after the accident with dizziness and loss of feelings in my hands. They did a CT scan and said that I was fine but had spinal stenosis. I continued to go to the chiropractor as per attorney and my symptoms worsened. The chiropractor repeatedly recommended an MRI. But the attorney office wouldn’t approve it because I had the CT scan. Now even after surgery on my neck. I suffer nerve damage in my hands and hyperreflexia (involuntary movements in my legs) could this have been prevented? Who is at fault here? Chiropractor? Attorney? I did as I was told and currently still undergoing treatments.