is not the sole cause of ur excess weight. hypothyroidism is known to cause a weight gain of about 2-5 kgs. Presently u need to increase the dose of ur thyroid medications. Pl get in touch with ur primary care
physician. And for weight loss
there are no shortcuts. U need to slog hard at the gym and have to strictly follow low calorie diet. if this doenst work - weight reducing surgery would be the best option.