Echogenic Bowel

hello mummies, feeling very traumatised as sonographer and consultant said my baby had echogenic lungs and bowels at week 13. And 4 weeks later (at week 17) the lungs looked normal but the bowels still showing echogenic. iGene test shows high risk in down syndrome. please help as I am feeling scared and suffocated. consultant is asking if I am going to do invasive test.