If everything is predestined, then what is there to worry about? We just need to do as much good as possible to make the world peaceful. If dreams can be predicted, then we might as well believe in ourselves. There must be something good waiting for us, because we have done nothing wrong.
From a scientific point of view, we just need to relax and have a good sleep, because maybe your forehead is sweating and mosquitoes are biting when you sleep, which makes you dream.