You are waiting to hear if they really want you, want what you did, want what you do.
What you do have is time.
If you have too long to think, or if you obsess, then...
You may start wondering: Do you have "it"? Do you have a career in you? Do you have a great actor in you? Do you have a good actor in you? Even if you are with people or your friends, family, you are isolated with the knowing that you are waiting, that you could hear something at any moment that changes your life. People ask you about it--"How did it go?" or "Did you hear anything yet?" "It should would be great of you booked that one." For the actor, this is like waiting to see if you have the winning lottery ticket. But the lottery ticket is you. What you do or did.
This is where the actor has to turn him or herself around.
Do you believe in yourself?
In the room, so much depends on you, but there is so much that depends on them. You can't control other people. They might get you, they might not.
You bring the life of the character as you see it. You bring it to life.
To deal with the fear, the anxiety, you must reconnect with your heart, your purpose and you move forward. Let nothing stop you. Instead, nurture yourself, take care of yourself, have compassion for yourself. You don't know what they are thinking. You focus on what has meaning to you. You rediscover your sense of purpose.
Create the specific world that you want to bring in to the room. Let them feel that your world (the fruit of your work on their text) is being created right before their eyes and ears.
Let go of the goal being to get the job. It brings too much tension. Make the goal to do the work, to let them see you do the work you love. Let them see your love of acting. Of creating that world.
"No one can make you feel inferior without your consent."