This is just a personal opinion, but I speak from the vantage point of having had two back surgeries myself - cervical and lumbar.  The first thing I'd do is go to a neurosurgeon, not an orthopedic specialist.  I don't want anyone touching my spinal nerves, discs, etc. that isn't a neurosurgeon.  There are many orthopedic surgeons who are probably qualified to do spinal surgery....but I want the best odds I can get, because a wrong move can incapacitate you.  Once you find a good neurosurgeon and get an appointment, bring your MRI films, CT films, Myleogram results...anything you have - along with the radiology reports - to the appointment.  Explain what your issues are with pain, where you believe it is originating, whether you've had any physical therapy, etc. and try to set up a plan of action to resolve what's going on.  While MRI's are not always totally definitive, they are one of the best tools that medicine has for diagnosis. Most doctors don't rely totally on one test and will often request a bone scan or a myelogram or even a CT....since each test shows them something different and confirms a diagnosis in iffy situations.  Good luck.