I am wondering what type of orthopedic surgeon you saw? I would strongly recommend you see an experienced spinal deformity specialist, one who sees lots of scoliosis cases. You can search for ones in your area at the Scoliosis Research Society website, www.srs.org.
If this were me I would need to know a lot more detail about what type of surgery is planned, what levels, etc.
My situation was somewhat similar to yours about 3 years ago, and I elected to delay surgery. Then my 38 degree curve jumped up to 47 in 2 years' time, and my stenosis and spondylolisthesis got worse. Last October I had a fusion T8-pelvis, which I am still recovering from. It was a huge surgery.
Gayle, age 49
Oct 2010 fusion T8-sacrum w/ pelvic fixation
Feb 2012 lumbar revision for broken rods @ L2-3-4
Sept 2015 major lumbar A/P revision for broken rods @ L5-S1
mom of Leah, 15 y/o, Diagnosed '08 with 26* T JIS (age 6)
5/10 VBS Dr Luhmann Shriners St Louis
5/16 6 yrs post-op, 24*T/ 22* L, mild increase in curves, watching
also mom of Torrey, 12 y/o son, 16* T, stable