Does scoliosis have anything to do with me being short and having a short neck?

Maybe. There are certain genetic disorders that that can affect you your stature and have related scoliosis. See you orthopaedic spinal specialist for a complete physical.
Probably not. Scoliosis is a lateral curvature of the spine, and does result in a loss of height, but probably not enough to account for short stature. Most scoliosis occurs in the thoracic and lumbar spine and hence probably does not account for a short neck.

Related Questions

I am 4'7 and I was born with scoliosis. Does having scoliosis have anything to do with me being short and having a short neck?

Can reduce height. Scoliosis can contribute to shorter height, depending on severity of curvature. With shortness sometimes bone dysplasia contributes. Have you been worked up for genetic cause?
Possibly. There are some cases of scoliosis that are associated with other musculoskeletal disorders. Klippel-feil syndrome, for example, is a condition in which patients have a partially fused, short neck and 60percent of them also have an associated scoliosis. Consider being seen.