I have always set goals for weight loss for myself. For example: I will lose 10 pounds by June. This sets you up for failure. Set your goals for what you have complete control over. For example: I will exercise 5 days a week and stay within my food plan.
Sometimes our bodies play tricks on us while we are trying to lose weight. We build more muscle that weighs more than fat. I only lose weight every ten days... it is funky!