Anxiety and unrest come from a place of insecurities; insecurities from past experiences as well as insecurities of the future and what could become.
But most importantly, it results from an insufficient knowledge, understanding and awareness of Who God is and what He has planned for you.
Life is a journey of Faith! Challenges will always come but in Christ we are assured of Victory always. Hence, we have to face life with determination to win always no matter what we face. Because Christ has made us champions and we shouldn't live below our calling and strength.
You can win in anything! As long as you live your life according to the word and not your experiences, circumstances will always conform to the word in you.
Fear nothing! Worry about nothing! Live life in absolute trust and dependence on God and His word. He will never fail, He is a rewarder of them that diligently seek Him.
Set your focus on God, and trust Him help you accomplish all He has called you to do and be for His glory.