“Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own.”
— Matthew 6:34 · NIV
Notice He doesn't promise there's no trouble. He says today's portion is enough to be getting on with — so don't import tomorrow's as well. Most of what's crushing you this morning is borrowed. Hand back everything that isn't due today and see what's actually left. It's usually manageable.
Father, I'm handing back tomorrow. Help me carry only today.