Haih, I can imagine how scary that must be! NT scan readings can be ambiguous sometimes, and honestly a few of us in my mum circle went through similar situations, the important thing is the blood test came back healthy, which is really reassuring la. The combined screening (NT + blood markers) is more accurate than NT alone, so that's a good sign. But since you're still worried, definitely have a chat with your doc about what the numbers mean and whether they want to do any follow-up scans just for peace of mind, sometimes that helps you relax better. Congrats on baby, and try not to stress too much ok, most babies turn out perfectly fine!