I am an 18-year-old girl . I was diagnosed with scoliosis two years ago : 37 degrees (thoracic) and 45 degrees (lumbar). I had a brace and did physiotherapy. Now the curvature has reached 42 degrees (thoracic) and 48 degrees (lumbar). I don't suffer much from back pain and even if I do, I can handle it. Is the surgery necessary in my case?