sald diets are terrible for you. when you cut out out carbs that much and that quick, you put your body in a glycogen shock. it is used to operating at a certain level of sugars in the bloodstream, and now there are hardly any. when you stop the diet, the weight will come back on.
just monitor how clean your calories are, and switch to comlex carbs like sweet potatoes, wheat pasta, whole grain rice, etc. stay away from white pasta, bread, etc.
it will take a little longer to get the results you want, but they will stay with you longer. if you need any tips pm me.