In your younger days, you would get nervous whenever you had to present talks in front of people. This happened because you were trusting in yourself to deliver a talk.
After you committed your life to Me, you entered into My rest which occurs when you cease from your own works and instead trust Me to live My life through you. After that commitment of yourself (body, soul, and spirit), you trusted Me to help you do My Father's will each day of your life.
There are days when you forget that commitment, and you once again begin to worry and be anxious because you are trusting that you can overcome obstacles in your life on your own. When this happens, renew your commitment to Me and allow Me to work through you both to give you the will to do My will and the way to accomplish it.