Low Fetal Fraction?

Anna

I had my NIPT done at 10w5d. Everything came back low risk which is great, but my fetal fraction was only a 4.2%. From what I read anything below 4% can produce false negative results. I have my anatomy scan Monday, but I’m freaking out thinking that maybe there wasn’t enough baby DNA to get an accurate reading... anyone else have a lower fetal fraction and everything be ok?