Short Arms And Legs..Deformity??

Hey mamas, I have a question. A specialist informed me yesterday that my baby girl has very short arms and legs. And that somethings wrong with her hands and feet. My family has no known genetic disorders, or my child’s father side. Anyone else went through this??

Side note: I’m 21 weeks but baby is measuring 18-19 weeks. They also told me before that my due date was 2-3 weeks off. And her arms and legs on her ultrasound look very normal