anatomy scan coming up

I have my babies anatomy scan coming up in a week. all the Drs I've been seeing, and even mom's, are telling me how incredible it is and what an amazing experience it was. I can't help but feel anxious and worried that they are going to find something wrong. is this normal?

I've been in almost every week, at least every two weeks. seen a million ultrasounds, hear the heartbeat all the time. everything has been absolutely normal and indictive of a healthy baby. I just can't help but feel something is going to go wrong. I don't know if it's the years of infertility or the being told all my risks or what