Worry & anxiousness are realy based in our past experiences. We imagine that what has happened before will happen again.
''Do not look back when plowing or the furrow will be crooked'' Look to God.
''Do not worry about tomorrow it's got worries of it's own'' Rejoice in new opportunities it's a new day in the Lord.
If your aim is self gratification, self promotion, self righteousness you will worry.
Allow the Christ in you to come forth. Check your past (Control/hold back)