I just added a post on my blog about weight loss/management

There are so many factors to consider

exercise, eating, food allergies (some you might not be aware of), medications can cause weight gain and there is an article that plastics can also cause weight gain...as can lack of proper sleep and rest and high stress levels...

One of the best ways to start is by journalling food, exercise and symptoms/moods along with your weight. also measure girth of waist, arms and legs to get another baseline measurement.

Good luck (and keep smiling)
Han