Hello Anwesha,
Good to hear that you have changed your eating habits.
As for your weight gain, there would be multiple reasons for the same.Without one to one indept counseling it would be difficult to say what is causing the gain.
Eat healthy, exercise and avoid emotional eating.
Next Steps
Go in for a one on one consultation with a Nutritionist.Understand what for body needs.That way help you reach your health goals faster.