One baby almost 2 weeks smaller

Okay, so at my appointment today I not only found out I have HG but that my baby girl is measuring about 2 1/2 weeks smaller than my due date. My boy is right on track though. The doctor said not to worry now but if it gets worse in the future I might have to be put on bed rest or inducted early. I'm only 24 weeks so obviously I'm worried. Does anyone know if there's anything I can do to help my baby girl?