UGGGHHHHH!!!!

I just don't get how my weight is staying static no matter what I do. I won't say that I'm perfect with my diet, but I have been eating extra healthy lately. I'm on this weight loss contest. I have 5 more weeks to lose 10 pounds because I have nothing to show for my first 3 weeks. I just don't know what is going wrong because I feel like I lead an active life and that I eat pretty well. If I'm the same weight when I eat crap as when I don't eat crap, then why don't I just eat crap so I can be a little happier? I need some motivation to stay on track...