I think you need to consult with your doctor as frequent urination may be a sign of diabetes and you must be screened for that. Unfortunately that is a common problem with sudden weight loss, that you may just regain the weight afterwards. Gradual weight loss with lifestyle changes - including an exercise program and healthy diet with limitations to the number of kilojoules is the most successful, but it must be ongoing lifestyle changes and not a diet for a short time period.
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