Aww sayang, I know this feels worrying! But honestly, this is something you really need to discuss properly with your doctor or go for a follow-up scan, they'll monitor baby closely and give you the best guidance, okay? A few of my mum friends went through similar situations, and their doctors just kept a closer eye with more frequent scans to make sure baby's doing okay. Don't stress yourself too much, sometimes babies are just smaller, and that's fine! Eat well, rest, and trust your medical team. All the best!