I’m nervous about my anatomy scan.

I had my first scan at 16 1/2 weeks and my doctor never called to say anything was wrong, but I’m really nervous to have my anatomy scan done. I’ve been feeling like something is wrong with the baby- whether a heart defect, a brain defect, etc. I didn’t have this anxiety with my first child. Were you nervous about your anatomy scan? Did you ever feel like something might be wrong?