Hi
I agree with manasi & lifemojo expert , Try to maintain your intake & include more of healthy foods(salads, fruits , veg juices, soups, veg curry , lean meat , egg white once in month whole egg , skinless chicken, green leafy vegetables, whole grains , dals, cereals, etc).General weight gain should be- 1.8 kg(2-4 pounds) in the first 3 months of pregnancy. After that 1 pounds should increase in the each of month.
Moderate exercise like walk & after 8month do some pregnancy exercise .