Unable to lose weight. N weight loss.

I am a 30 year old female. I have a son of 5 years. The delivery was C section and till now i am unable to lose weight. My weight is 70 n height is 153 cm. My office hours are 1 pm to 11 pm. I work for uk/us clients in IT firm as a project manager. I start my day wid amla n hot water. By 10 am i go for a cup of tea. By 12 i take my lunch. Later by 1:30 i go for a short break with my colleagues and just share their lunch one roti n few spoons of rice. In evening by 5 we go for snacks break. I drink tea n white bread potato sandwish or bread omlet or french fries. At 8:30, i go for dinner, three chapaties n any sabji. I eat all vegetables. Nowadays dinner ends up with a cup of tea bcz of winter i guess. By 11 i reach home, i watch tv and go to sleep by 1. Kindly help me to improve my diet n weight loss.