Is it possible for my height to be lower because i have scoliosis?

If severe scoliosis: Scoliosis in many people is a mild condition that stabilized (curvature stopped increasing) when they stopped growing taller in their late teenage years. With mild scoliosis, one does not lose height. However, with more severe abnormal curvatures of the spine, one can lose some height.

Yes: The big curves(over 45 degrees) do steal some trunk height.