From a neurological point of view, your symptoms are not suggestive of a problem with the nerves.
Most probably the problem is musckuloskeletal
Sometimes, if a impact to your back was severe, you can bruise the spinal cord, giving a deep poorly localized pain that is often difficult to diagnose and treat
Medications for nerve pain are more likely to be effective such as neurontin, amitrpytaline, phenytoin, baclofen
I'm not sure if this has been assessed in your case
Trigger points do exist, usually initially caused by a precipitating event ie a prolapsed disc, but can become independent over time - a kind of hypersensitivity of the muscle and muscle covering to pain.
A good neurologist or phys med and rehab doctor should be able to evalaute and decide on a treatment plan - usually conservative with non-narcotic analgesics, muscle relaxants, and physical therapy
Good luck
Hi I read your thread and see alot of simalarites to what I am going through now. left side pain but i have numbness in the hand and burners through my back. I injured myself in sept on the job they did the same thing x ray whole nine.it was only sprained and there was swelling, now 7 mnths later i had an mva and upper back was hurting only but I had an mri performed on the whole back 3 studies and 18 films later I have degenerative disc disease also known as old age and a bulging disc that favors my left side and im in constant pain. now i know what treatment to get i will. get the mri performed.