So nervous

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My doctor called me today to tell me that during my anatomy scan they found something in my baby's brain that looked "off". She said not to worry and that they said it was likely artifact which means interference with the sonogram machine and could be due to him moving. She said everything was measuring great and that all it means is that I get to see my baby again. But of course, I can't help but to be seriously worried. Has anyone else experienced this before?