Jack, years ago I had heel pain and my podiatrist told me mine was from my spine too. PT did nothing, no help from piriformis stretches or exercises. Then my pain doc did a lumbar epidural for some thigh pain, and the foot pain went away. I had a large heel spur too, but the podiatrist said they don't cause pain, and he was right.
My pain doc group, a physiatrist and an anesthesiologist, have been most helpful. They actually DO something, where neurologists just look at pictures and pass out muscle relaxers and neurontin.
That was all before I broke my neck and got the burning and pins and needles in my feet and other places. It doesn't take an actual injury to mess up the spine. A bit of arthritis or scoliosis can cause nerve pain that you feel peripherally too. The pain isn't necessarily where you feel it. I've had shoulder pain that I thought was from shoulder surgery and turned out to be from my neck. Oddly, it was cured with a lumbar injection, which was for back pain, that migrated up to my neck and maybe my head. Yes, they can do that. There are little channels along the spine. Very curious.
It's time to get the report from the neurologist and any reports and disks from any imaging too. You have a right to them. They're your records. Then I would go to a pain clinic - one that gives drugs as well as doing procedures, because some don't. Or maybe see a neurosurgeon or a rheumatologist or an orthopedic surgeon - someone who can actually DO something.
Sorry, there are no cures if you have central pain syndrome like I have. Some people can get an edge off the pain with neurontin or Lyrica or Baclofen, or many other drugs. Opioids don't usually work, although they might help if you have other pain. I get a bit of relief with Tramadol which isn't very strong, but it also raises serotonin which makes me happier.
http://centralpainsyndromefoundation.com/ http://centralpainsyndromefoundation.com/?s=information+for+doctors&submit= I seriously hope you do not have this condition. Seeing the right kind of doctor can solve the puzzle, although it won't be in one visit. If your MRI is old get a new one if the doctor orders it. with and without contrast if necessary too. They may also want a CT scan. Take all your old information and test results with you to every doctor you see. Hint: make copies, including the disks. You might have to put up with more PT to keep the insurance companies happy and try all sorts of medicines, but finding out what is going on is worth it.
Best wishes