If you find yourself trying to write, you’re on the wrong page. Forget trying. Let the writing go for now and do something else. Cook. Garden. Watch a great film. Start a great read. Go for a walk. Clean the garage. Notice I didn’t say ‘think about your book’.
Words will emerge that need to be written. Let them take over. Turn them into great scenes, characters and story lines. Trust the work. It just might change all kinds of things.