Ultrasound showed Bright spot on heart - eif

Hi! At 20 weeks (I’m 24 tomorrow) the ultrasound showed an eif - bright spot on heart. I had an extended ultrasound and all his measurements (neck, organs, nasal bone) were perfect. I had quad test at 16.5 weeks which gave me a 1:3600 chance and everything came back negative. A bright spot can be considered a soft marker for Down Syndrome, typically if there are multiple soft markers with bad bloodwork etc.

The doctor is sending me for no other testing and said it’d be very rare if my baby had Down Syndrome and that the bright spot is very common in typical babies as well.

But sometimes I just continue to worry. Anyone with the same experience?