Change your body's composition to more muscle and less fat to keep weight loss off for good. That's easier said than done but you must keep that as your main goal when trying to lose weight. It also takes longer to change your body's composition, so be patient. Its worth the wait. Quick weight loss gimmicks will never work for you.
What if the bathroom scale only showed you your body fat percentage and not your weight? That wouldn't be a bad thing. A woman or man with 10-15% body fat is never a bad thing. Body composition ( less fat, more lean mass ) is the key to permanent weight loss.
If you lose 20 pounds in 10 days using severe calorie restriction with no exercise (you probably won't have the energy to exercise), just about all of that weight loss will be lost muscle mass! You need to increase your lean mass to permanently speed up your metabolism! You need to build a lean body that will give you good health and one that will last through the years of your life. If you rush the fitness process, it won't work!
Fortunately, muscle mass can be maintained/increased (and body fat decreased) throughout your life through weight training and cardio exercise. Weight training also helps to keep your bones strong ( preventing osteoporosis ).
When was the last time you had your body fat percentage checked? Make a habit of doing this once a month. Or, you could get a scale that will tell you your weight and body fat percentage. Then, you will know your real progress.