Worried

Ladies have any of y’all were ever told from your obgyn that they see a small dot on baby heart but all blood test came back normal my dr told me you usually see that dot in Down syndrome babies I’m so scared and nervous she send me to a specialist but I haven’t got a call yet to schedule appointment I’m 29 I have 4 healthy kids and no history of Down syndrome in my family or baby father family please if any of y’all experience this let me know if they were right or can it be true??