Anatomy scan redo

Cat
I had my anatomy scan this week- all seemed to look good from
​A first glance. They sent it to the Dr and he said he needs better views of the heart- likely that's all this is, they didn't get enough pics or clean ones of the heart so I have to go back in. Of course , my pregnant brain is making stuff up. The nurse specifically said this is nothing to worry about - everything was awesome but he just has to have all the views, but... 
​Has anyone else had this happen? I know it's common that drs need more better/ pics. I go back next week, for more. I just was so happy thinking my baby was fine and this popped my bubble. Hoping it's nothing! Need reassurance, I guess.