Intercostal neuralgia

I am trying to get a diagnosis for nerve pain and spasms in my right upper back and right chest wall that also affects my rib cage on the right side s/p sports injury many years ago. Things got worse after 22 years and I can’t get a diagnosis. It causes burning at that spot in my upper back, radiating/shooting pain and muscle spasms rib and chest wall. They thought it was my cervical spine and I did have successful spine surgery but I relapsed. The ortho surgeon and a neurosurgeon do not think it is my spine at this point. They physiatrist thinks it is my long thoracic nerve that had been affected by c5/6. Unfortunately I have been turned down by Mayo Clinic for an appointment so I can get a diagnosis.