Spinal fusion

Hi Esther, I recently purchased your book because a friend told me how dramatically it helped her health.  I have begun reading and am so impressed by the clear logic, clear communication of the logic, and beautiful photos.  Before I begin the lessons I wanted to ask you if I need to know anything further based on my condition.  I was born with a rare "birth defect" called Freeman-Sheldon Syndrome aka Distal Arthrogyprosis Type II.  My spine was surgically fused when I was 12yrs old... the entire thoracic.  This was treatment for scolisosis and kyphosis.  I was in "halo-traction" for over a month and had the Harrington rod, but it was removed years later. I am turning 44 in Aug.  Now my cervical spine shows fusing- C5,6 and 7.  I began to experience severe neck pain and episodes of locking up, burning, and muscle spasms in my neck... radiating up the left side of my skull.  The doctor says that it is caused by bone spurs.  I went for physical therapy and the massage and manual traction helped, but  the episodes retunr when I don't get this regularly and insurance considers that "maintenance" and won't cover it. Is there anything I should know before I began the lessons in regard to my fusion?  I am sure you will tell me to work under the supervision of a doctor.... but I will be working on my own and take full responsibility for whatever outcome I get.  My entire childhood revolved around so much medical intervention that did me more harm then good.  My adulthood has been a journey in recovering from painfully invasive treatment and trauma on all levels.  Every time I go see a doctor I find that I understand my body and its needs more then they do, and they have no answers only harmful prescriptions. With so much of my spine already fused can I create any lengthening? Thanks for your passion and for spreading your knowledge and wisdom! ~Maria