you can do one of two things....wait it out and see what happens, or try to imagine or visualize something while it's happening to get it off of your mind.

Normally I try to wait it out, and there are some small chances that the dreams don't start, or i want to be in a certain scene, or the things i'm experiencing are a little too intense...so I start visualizing the scene, and tell myself that I'm going to enter a dream soon, and remind myself that none of the things that are going on aren't real.

I hope this works out for you. let me know how it goes.