Dot on baby's heart????!!!!!😭

Haley
My doctor a 20 weeks told me there was a dot on my baby's heart so they took blood work for chromosome abnormalities that came back negative. Well I went to my appointment yesterday and they did an ultrasound and she said it was still there so there gonna make me an appointment at fetal development. Has this happened to any of y'all I have heard it can cause Down syndrome. I just want my baby to be healthy and happy!