Welcome to FitDay. I am sure you will find many helpful tools and people here.
Have you researched whether 1000 calories or less is healthy for you? Generally, when women go below 1200 or so, the body starts to slow down the metabolism to compensate for that, paradoxically making it harder to lose even though you are eating fewer calories. You may want to get some others' opinions here regarding that and/or research it in other places.
This comes from what I've read and also from personal experience. There are many online calculators for how many calories you can have per day and still lose at a good rate...here is one of them:
Calorie Calculator - Daily Caloric Needs