Baby is measuring small

Shanice • Baby dust to all!!

I found out at my anatomy scan which was done at 6 months instead of five, that my baby is measuring small... Could this be because of the Zika virus or some other neural defect? My serum alpha fetal protein panel said negative, but on the panel, the neural tube defect quantity was 9606. Is that high ? I have a meeting with a specialist Monday, but this doesn’t stop my brain from racing. I’m scared to be honest... I don’t know what to do...