Having my little girl tomorrow via C section 19 days early

Got checked into the hospital 2 days ago for high blood pressure, after many tests and an ultrasound my placenta is not growing and my little girl is small. She's 5.2 pounds, and the placenta isn't feeding her the way it needs to be. She's behind about 2 weeks in size, and also breech. Hearing the words your baby is coming tomorrow we need to do a c section made my heart stop. I wanted to do this naturally, and I am terrified to have major surgery. I thought I'd be able to go home today, but found out I'll be a mom tomorrow. Praying for a smooth delivery and my baby girl to be healthy and strong. I am terrified :*(.