Girls good evening) My acquaintance gave birth not long ago, her baby was…

Girls good evening) My acquaintance gave birth not long ago, her baby was born sunny, she was born during pregnancy, this acquaintance had a lot of arguments with her husband and she had stress when she did ultrasound they told her that everything is fine, second trimester such a girl was born, question in what? My thoughts are like this, what if I give birth to a Down syndrome child these thoughts do not leave me, what should I do, it was said at the ultrasound that everything is fine...