Shadow showing on heart.

Nicole
I went in for my anatomy ultrasound yesterday at 18wks and 2 days. The doctor stating she found a shadow over his heart. The doctor said that since my blood work for anomalies came back normal she isn't worried about it. She said it is quite common to see and it is probably just a shadow from the ultrasound being magnified. She wants me to go back in 10 wks to look at the baby's heart again and if a shadow is still showing I will have to go to a heart specialist and have them diagnose the problem. Has anyone experienced this?