Hi everyone, I went for the 2nd screening ultrasound — knock on wood, …

Hi everyone, I went for the 2nd screening ultrasound — knock on wood, everything is fine, but the report says I have a low placenta: it's at 2.9 cm and should have moved up to 5 cm. I want to ask if this is dangerous and if it could be because I sit a lot; I work in a salon myself ???? (I do nails) — could that be why my placenta is low? Please advise, she said I probably need to wear a maternity support belt — which one should I wear? Share your experiences, girls.