Anatomy scan anxiety

Emily
I'll be 18.6 on Friday for my anatomy scan and I'm so incredibly nervous that they're going to find something wrong. I'm pregnant with spontaneous identical twins, which is highly unlikely, so everyone saying the odds are in your favor doesn't seem to help. I had a miscarriage at 11 weeks last October, so I feel inclined to expect the worst. Any words of wisdom or positive stories about your anatomy scans that might help?