Sayang, please check with your doctor or OB-GYN soon, weight estimates at scans boleh vary, and they're the ones yang tahu best based on your full picture and scan quality. A few of my mum friends worried about the same thing during pregnancy, but their doctors assured them everything was fine, don't stress yourself too much until you get proper feedback from your medical team, okay? They'll advise you if anything needs attention. Thinking of you!