Has anyone had a shadow marker on the heart at 20 weeks but all the other tests including NIPT gently c test all came back low risk No genetic test and 12 week all low risk and good but now this- in so scared and what does it mean? All my other three perfect healthy no issues ever ...

Anyone had this and it’s all works out ok ? My doc said not to worry but he knows I do anyway so we’re seeing fetal cardiologist in a few days but I’m so scared- anyone have positive things to say? ?