The Bible says, 'Trust in the Lord with all your heart, and lean not on your own understanding; in all your ways acknowledge him, and he shall direct your paths' (Proverbs 3:5-6 NKJV). God wants us to trust him. As long as we're struggling to work things out on our own, we're not trusting God, and that means we won't have peace. We can trust him with our work, money, relationships and future. Everything!
All that happens in our lives can fit into his plan for us - even our problems, miseries and troubles (see Romans 8:28). And all he expects from us is to trust him, and acknowledge that he can handle it. When we do this, he promises to 'make [our] paths straight' (Proverbs 3:6 NIV).
When we try to direct our own lives, we follow paths filled with indecisiveness: 'Should I do this or that? Should I go here or over there?' And it produces stress! But as soon as we trust in the Lord, he directs our paths and makes them successful, not stressful. 'Do not worry about anything, but pray and ask God for everything you need, always giving thanks. And God's peace, which is so great we cannot understand it, will keep your hearts and minds in Christ Jesus' (Philippians 4:6-7 NCV). Notice the order - prayer first, then peace.
So what now? If you're worrying, you're not praying. Worry is a worthless emotion - a waste! So when pressure starts building up, instead of panicking, start praying! Prayer is a remarkable stress reliever.