Hello, I had an ultrasound at 32 weeks, showing a fetal head presentat…

Hello, I had an ultrasound at 32 weeks, showing a fetal head presentation and also found a small opening on week 20. The ultrasound showed it wasn't visible, so we placed a Doppler of 0.17 cm (1.7 mm). At 12 weeks after blood tests, there was a risk for Down syndrome, with low PAP-A. Only at week 20, we removed any abnormalities in the fetus. And now, at 32 weeks, I don't know what to do. Does this mean that Down syndrome might be present? Has anyone experienced this?