So much, that women these days start looking for losing weight tricks and tips even before giving birth. It must be kept in mind that your body has developed a human life for 9 months, and then given birth to it. The amount of changes it has gone through during that time is immense.
You must not fret about it so soon, and take it slow. Reality check would tell you, that reducing the pregnancy weight in a healthy, natural and stress-free time might take longer than expected