High NT and high risk combined bloods

I had my 12 week scan which revealed my baby has nuchal translucency of 4.6mm whereas the typical or desired amount is 3.5mm and under.

I was informed that this could indicate a genetic abnormality such as Downs Syndrome, Edwards, Pataus or could be an issue with the heart, or other structural issue. I was also informed it could be nothing and only indicated that further tests should be done to establish the level of risk.

I had a blood test done which came back high risk for downs syndrome at 1:13 and high risk for edwards and pataus at 1:150. My hcg and papp in the bloods were all normal.

I have been offered NIPT or to have invasive testing (cvs or amnio).

I am not sure which way to go.

I would appreciate some advice from those who have been through this process and confirmation as to the outcome of your experience with genetic testing.

Thanks