Further consultation with orthopedist/neurologist
I have gone through your medical history and feel sorry for the situation you are in!
You are reporting to have had a recent fall over backwards on a tool box and you are still having pain and "pins-and-needles" feeling although the pain killers you are using.
During the fall, many elements of spine might have injured including vertebral
bodies, spinal ligaments/musculature or inter-vertebral discs.
I highly recommend to get further
- evaluated by an orthopedist/neurologist
- X-ray and MRI
of the spine to rule such injuries out.
Hope it answered to your queries! Let me know if I can help you further!
Wish fast recovery!