Anxiety 😖

I have my anatomy scan on the 29th of May and I've been having extreme anxiety that they will find something wrong with the baby. The last time I saw baby was at 7w6d and it was just a little alien looking clump of cells. It keeps me awake at night with all kinds of horrible scenarios running through my head and I can't stop worrying. I just want my baby to be healthy. How can I ease my anxiety? I feel like I'm going to worry myself to death...