Spot on baby's heart?

Nicole
So the other day at my 20 week ultrasound, my OB said that my daughter is growing perfect, but she has a spot on her heart. He was almost dismissive about it, said it was nothing to worry about and said nothing further on it. He didn't say they were going to check again, or run more tests. Anyone else experience this and what were the results? I'm only asking because my OB really said nothing to assure me that she'll be alright