32 week growth scan- need opinions!

Alexis
So I had a growth scan bc A protein in my placenta (Papp a) or something came back a little low at my sequential screening so they wanted to make sure she wasn't low birth weight. Well turns out she's opposite. She's already measuring 5lb 7oz!! The thing that worries me though is that for everything she is measuring at 34 or 35 weeks except her femur is measuring at 32 weeks (which is what I am). But of course I googled and wish I hadn't bc Down syndrome came up and now I'm nervous.