Femur Length Pendek

Salam, saya in my 20weeks ++ now and semalam checkup + scan baby. All the results are alhamdulillah, baby is healthy. Only one minor concern (doktor cakap minor but to me Major ??). Femur length is delayed by 4-5 weeks. And after Google I found many more reasons to worry for. Now I am so worry, sad, panic etc. Ada tak mommies yang pernah ada masalah yang sama.. Please shareeee thank you ???