Sayang, ini memang perkara yang perlu ditangani dengan serius, please see your doctor or go to the hospital as soon as possible untuk scan yang lebih detail dan assessment yang proper, ye?
Timing calculation tu penting, and there could be a few reasons why baby tak nampak clear in the scan, could be dating issue, bisa juga positioning or something else, but only a doctor can tell you for sure after proper examination. Don't worry sendiri, just get checked out quickly so you know exactly what's happening and get the right care, ok? Thinking of you, mama.