I would like to give some advice to everyone who has embarked on a weight loss journey. Since I've had a massive weight loss and struggled with this problem for most of my 62 years, I feel I have some experience that may help. Yes, I have had a gastric bypass because the situation got totally out of hand. However, the weight loss journey has much in common with those who choose a low calorie, low fat, exercise routine. DO NOT DEPEND ON THE SCALE ALONE TO CHART YOUR PROGRESS! For some reason probably to do with our evolutionary process, our bodies try to hang on to weight. Physiologically, I do not know the mechanism that causes us to plateau. That phenomenon is the one in which we diet and exercise but NOTHING shows up on the scale. We become discouraged and are tempted to fall off the wagon because there is no reward for all our efforts.
The second and more reliable measurement of progress is the tape measure. And I don't mean only the bust, waist, hips either. I kept two records during my journey ... the scale and the tape measure. When the scale wouldn't budge for up to 3 weeks, the tape measure reaffirmed that I was making progress.
Learn to measure properly. That is, the same places with the same tightness of the tape measure. No pulling too tight, just comfortable. The neck, above the bust, the bust, below the bust, the midriff, the waist, between the waist and hips, the hips, the thighs, the knees, the calf, the ankles, the wrist (yes, the wrist), the forearm, the upper arm. And right arm, left arm, right leg, left leg (they're different). Then add up the total inches. Do this about 2 to 3 weeks apart. You will be amazed! You will be rewarded!
If you are doing lots of exercise remember that muscle mass WEIGHS MORE than fat. So the scale may not move but the tape measure will.
I wish you all great success. Do not get discouraged.