Prayer for Faith & Peace

I have been gripped with fear (anxiety) about interviewing for a teaching position. It has gotten so bad, I have anxiety about going to job fairs. It is even keeping me from wanting to apply for positions online. I can feel the anxiety just thinking about this situation. Why do I feel like this, because I feel I don't know enough and won't be able to answer their questions? Thank you for your time and prayers. May you be refreshed. Patrice