Microcephaly (small head circumference)

Hi sorry to bug everyone not sure if this was the right place to put this. I had my morphology scan last week at 20 weeks and they found my little girls head was measuring in the 2nd percentile. They are worried about microcephaly, so I am redoing the scan next week. I shouldn't have but I did google it I wanted get across what it meant - I am now very worried. Hoping someone might have a good story they can share