First of all, your problem starts before the interview. Before an engineer, you are a human being. Think about the balance in your life. Once you understand how

First of all, your problem starts before the interview. Before an engineer, you are a human being. Think about the balance in your life. Once you understand how to balance your life, you can proceed to worry about your occupation. Think to which extent your external and self criticism is factual and fair. Before dealing with opinions, deal with facts. What are the FACTS behind the opinions? are they true? is the opinion proportional to the fact? And work your way through there.