“Do not be anxious over anything, but in everything by prayer and supplication along with thanksgiving, let your petitions be made known to God; and the peace of God that surpasses all understanding will guard your hearts and your mental powers by means of Christ Jesus.”
~Philippians 4:6,7

If this is one of the verses I’ve cited most from the Bible, it is because I often need to remind myself of this.
Jehovah does not expect us to never be anxious, but he does expect us to rely on him through our trials. (1 Pet. 5:7)
He promises to be there for us, either by providing strength to endure or by showing us the solution. (1 Cor. 10:13; 2 Cor. 4:7-9; 2 Pet. 2:9)
Jehovah often answers our prayers in ways which we could never have even imagined. (Eph. 3:20)
If we look to him for comfort, his training will make us stronger and ‘firmly ground us’ in the faith. (1 Pet. 5:10)