So anxious..

Katie • 24yrs old / Ohio / hairstylist / Samson Joseph due July 20th
I am currently 8wks and 2days. My first ultrasound appointment is the 21sf which would put me at 9wks and 4days. I'm petrified... I keep seeing things like "missed miscarriage" where the baby stops growing at a certain point, or no heartbeat. What shakes the anxiety?