EllyC,
If your doctor is telling you that the sciatic nerve is causing your hand problems, your doctor has no idea what he/she is talking about.
Upper back pain in the shoulders could be coming from your cervical spine and spreading down to your hands and fingers is very likely to be the C8 area of your cervical spine. something could be pressing on your nerves in that area and causing the numbness.
The C8 nerve compression can mimic the symptoms of carpal tunnel syndrome and needs to be checked out with a spine surgeon, as should your lower back pain.
It could be from arthritis and it could be from other spine problems.
You need to see a spine surgeon for evaluation and diagnosis. Probably have an MRI of the entire spine done and maybe an EMG as well.
You need to see either an orthopedic surgeon who specializes in spines only or a neurosurgeon that specializes in spines.
Until your insurance kicks in again you could try some ipuprofen to help reduce any inflammation that is occuring.
Blue light, you need to do the same thing. Sounds like a possible C8 nerve compression is going on. It could be from the accident and has just taken time for symptoms to develop. that can happen.
A neurologist is not the one to see, but rather a spine surgeon to see if you have cervical spine issues.
Dawn ebbs, same advise for you.
You all sound like cervical spine issues and ellyc, you sound like you have both cervical and lumbar issues.
A regular physician is not qualified to diagnose and treat spinal problems of any kind and if your regular doctor is trying to do so, I would suggest that you get a new doctor.
If you present to your physician with spinal pain, back pain, numbness etc. you should be immediately referred to a spine surgeon for evaluation and treatment.
Adding supplements to your diet without knowing what is wrong can be dangerous. I would not suggest that you try adding any kind of "minerals, supplements" of any kind until you are properly diagnosed and a spine surgeon says it's OK and safe to do so.
Good luck
Fran