All these fad diets seem to have pulled us a good distance away from the good old heathy food pyramid. It seems now thin-ness is more important than healthiness.
I assure you, as a long-time carb-worshipper, you can loose weight and keep eating wholesome and healthy food. Whole grains should be one of you main energy sources, along with fruit and veg. And they don't only give you energy, they provide essential fibre also. Its fine to cut out high-GI and highly processed stuff, but please, give wholemeal bread a break.
In the long term, depriving your body of carbohydrates (which we NEED to function), and replacing them with too much protein can cause renal dysfunction, and our bodies weren't made to have a high fat intake. (Although we need some of that, also).
Basically, if you have a balanced diet - lots of fresh salad & sandwiches, fruits, nuts, yoghurt, lean meats and lots of whole grains, and get active regularly, you won't just be thin, you will feel energized with an overall sense of wellbeing.