Driving test nerves and panic. I have my driving test tomorrow morning. And have been sick with nerves.?

Please help me. I have my driving test tomorrow morning. 9.37am!!! I am feeling sooo nervous and shaky. Have been sick with nerves, and can't eat anything.Really dry mouth, and feel so sick. HEL ME PLEASE. Any tips for staying calm and not panicking? Feeling really shaky.