Had my 20week scan today and I have to go back next week for a scan with a consultant as she…

Had my 20week scan today and I have to go back next week for a scan with a consultant as she couldn't see one of her vavles on her heart, she said she's not sure if she has a different structure which is normal or wether it's the way she's led but wants a consultant to look... She didn't seem concerned tho

Has anyone had anything like this and all been ok???