Light spot on baby’s heart

I just went to the doctors today for the anatomy scan and they found a light spot on the baby’s heart. The doctor said I tested negative for the Down syndrome screening at 1 in 16,000 but with this new light spot on the baby’s heart as a “soft marker” for Down syndrome the risk is now 1 in 1000 or 1 in 800. Has any other moms experienced this? Can you tell me how you handled the situation?