Are you losing Fat or losing Weight?
Nowadays everyone is so concerned with losing weight, yet no one cares about losing fat. It is never a good idea to start a fitness plan with the intention of losing pounds without understanding the difference to % body fat loss.
Always start your journey knowing what your body fat is. As you progress from week to week, have your body fat checked to make sure you are going in the correct direction.
Keep in mind that your weight might not change for the reason of fluctuations in water weight or increased muscle mass.