@aykut
Welcome to Mayo Clinic Connect!
You have a valid concern and want to know if you can expect further growth.
Your sister’s height might be influenced by her spine curvature.
My advice is to see an Endocrinologist- Pediatric if possible. They are better trained, I think, to evaluate growth problems. They can test all hormones involved with growth and puberty in addition to check your growth plates with imaging. They also will question you about your family’s final height.
Since you are a medical student you can request an appointment with Endocrinology at your University Hospital. Pediatric/Adolescent if possible.
Please get back to us after your visit!