soft marker for down syndrome

Today I had another ultrasound at 22w i didn’t think much of it until the doctor came in and showed me a calcium deposit on my baby girls heart. she told me this is considered a soft marker for DS even though it does go away. She has no other physical markers and her heart is perfect otherwise. I got some blood work done to see if they can give me any more information as to whether she does have it or not. I feel like my heart is in my stomach i’m so worried about my baby. Has anyone else gotten this news??