Slim- do you notice your clothes fitting differently? When you eat right and exercise you lose fat, but gain muscle and muscle weighs more than fat.
I'd suggest taking your measurements. The first place I lose weight is in my face and my breasts. Since there's no way to measure my face (smile) I measured my chest, waist, high hips, saddle bags and calves.
You might want to give it a try!
Kell