(ahem) diet

Well, I kind of went on a diet 3 or 4 weeks ago and since then I had gained 6 pounds. But this last week I actually lost one. I prefer to think of this as I was still gaining momentum from the gargantuan amounts of food I was eating before and now the weight will slope off dramatically now that I've lost the forward momentum. I had promised myself a treat if I lost 10 pounds which was to be yarn and needles for a sweater I want to knit but now do I have to lose 15 pounds before I get this treat? Are the diet police here? Let me know.