How to slim down?

Jialat, why am I keep on growing heavier and heavier??????? I am now as heavy as a pregnant woman in her 8th mth pregnancy. She is jus 0.5kg heavier than me. Faint. I already eat very little, exercise abit but why cant my weight go down….Really sian, I want to slim down but how…..Sigh. I really don't know what is happening within my body