It sounds like you're going to a clinic with a multidisciplinary approach to chronic pain. Many studies of human illness and pain show this works the best. This type of treatment views chronic pain as more than just a physical problem.
When a person has pain as long as you have, then other factors are involved. Multidisciplinary treatment looks at physical, behavioral, emotional, psychological, and even environmental factors. Studies show both a positive short-term effect with this approach and a long-term change in most patients.