Anxiety

If you’re experiencing anxiety, try asking God for what you need, explaining why you need it in light of His Word, and then thanking Him for all He’s done in the past, confident He will come through.

In nothing be anxious; but in everything by prayer and supplication with thanksgiving let your requests be made known unto God. 

And the peace of God, which passeth all understanding, shall guard your hearts and your thoughts in Christ Jesus.

http://bible.com/12/php.4.6-7.asv