White dot on heart?...

Rikki
Got an ultrasound done today and they saw a small white dot on the heart. Doctor said ultrasound was normal and not to worry but that he was just letting me know it was there. Because of my age and being that everything else is fine it doesn't increase my risk for Down syndrome at all. Tried not to do too much research because it all points to bad things however my risk for downs is still 1;3000 so we(boyfriend)(he is very reassuring) isn't worried but it conerns me a little bit. Anyone else ever been told this? What was the outcome?