When it comes to working with clients for weight-loss, I like to measure success by the way their clothes fit, not by what the scale reads. You should do the same. If you are strength training as you should be, muscle weighs more than fat. So, in essence you can be losing dress or pant sizes while staying the same weight. That's okay! You have lost fat but gained muscle. What matters is how your clothes fit. It's body fat, not body weight that truly matters.