Weight is a combination of different things such as fat, muscle, bone, tissue, gycogen, water and blood. We don’t shed pounds as soon as we start exercising!
Instead of focusing on your weight, concentrate on reducing body fat and increasing your muscle tissue.
Try to do three 30 minute aerobic sessions and one or two sessions using weights, each week.
Also, remember that exercise by itself is not terribly effective for weight loss. We need to take in the correct number of calories, too. So follow a sensible diet plan that gives you enough food and energy plus all your nutrition.