NT scan must always be interpreted with a Triple marker blood test.
Do not panic. Visit an obstetrician/fetologist asap. NT scan report means a lot and it cannot be discussed in detail in this forum.
Next Steps
Get a triple marker blood test asap.
Health Tips
DO NOT GOOGLE THIS. You might find only disturbing content about Trisomy 21. Though it is a possibility, just NT alone is not indicative of same.