Not losing significant weight every day is quite normal. Is it coming up to your period by any chance? If you´re counting your calories carefully and indeed only eating 1200 kcal/day while burning off 500 kcal/day through cardio you should be losing weight, even if water retention masks it for a week or two. If you´re getting nervous because of the lack of scale victories you might want to see if you can up the accuracy of your calorie count both on the intake and the output side: most people aren´t great at either. Weighing is a lot more accurate than measuring with cups (unless we´re talking about something as small as a teaspoon), condiments and liquids count, cardio machines tends to overestimate how many calories we burn...