Is a small femoral head the same as hip dysplasia in a 6 month old baby?

My daughter's pediatrician recommended that she get xrays because one of her legs seems to be longer than the other. She does not have clicky hips. The xray showed that the top of her left femur (where it joins the hip socket) is smaller than the one on the right. Does this mean she has dysplasia? We've been referred to a specialist but her appointment is in 2 weeks and I am freaking out.