First time mom worried 😭

Anyone else told after their anatomy ultrasound that their baby has a light spot on their heart? (I was 18 weeks) It’s called EIF (Echogenic intracardiac focus) and it is a soft marker for Down Syndrome. It is often times accompanied by other more obvious signs and markers but in my case it’s just the EIF. I don’t know what to think, I’m being sent to get a detailed ultrasound soon to check if it’s gone or if baby has other signs.. I’m now 20 weeks and 4 days 😩