How are you doing on writing your three pages per day? Are you stopping when you know what will happen next? Don't rewrite while you're in the creative process of getting the story down. Don't worry about leaving a scene out if it's not playing like a video in your head. Type "add scene about _____ here." Make notes all over the margins. Keep writing. I'm still revising my latest book, and it's almost there. I'll know it's done when I can read it all the way through, with very minor changes, and I feel happy with the world I've created. Most of all, enjoy.