EIF bright spots on babies heart

Midnight Society

Im having twins. Went in for 18 week ultrasound. Anyone know anything about bright spots (EIF) on babies hearts in pregnancy? They said one of the babies has this and it can be linked to down syndrome. I never got the genetic testing done so I'm going to do that today. Im so worried. Doctor says its nothing to be concerned about but of course I am. Anyone experience this or know anything about it?