Don't worry. You'll find your message in your mess.

If there is anything in life to worry about at all, it’s your wasted yesterday. Unfortunately, before you worry about it, you have to waste today doing so. Never worry!

Planning is worrying based on facts

In 25 Years, It Won’t Matter.

She tried to worry that something terrible had happened to him, but didn't believe it for a moment. Nothing terrible ever happened to him, though she was beginning to think that it was time it damn well did. If nothing terrible happened to him soon maybe she'd do it herself. Now there was an idea.

I'd prefer 'be strong' than 'don't worry'.