Should I worry?

Cassie
So may baby boy had his 20 week anatomy scan and the radiologist said she would like to repeat the scan in a week because she needed to look more into his heart. She said he was breech so it was hard to look in his heart we seen 4 chambers. But is it possible she just seen something and wanted to check it out again before she told me, or just really couldn't see? I'm so nervous and scared.