I have gained 5 kg of weight from last 1 year. i am not being able to reduce the same despite of diet plan or exercise. Is it due to thyroid problem or some hormonal issue..how will I come to know the reason of weight gain. I feel too much acidity from last 3-4months. Is all interrelated problems? Kindly suggest a suitable way of identifying the exact concern.Further,during different times in a month my body experiences differently..at times i feel my body weight is too high especially before periods