Not being funny but.. you already said you think the dairy, nuts and fruit are causing the stall yet haven't taken them out. I know it's hard but you just have to do it; cut them out completely for a week and see what happens. If cutting one makes you crave the other two, cut them ALL out at the same time and load up on protein and fat. Don't worry about portion sizes right now; one thing at a time. Once you get the cravings under control if you still think your portion are off, you can address it then. Good luck!