Weight gain?

Ok so every time I go to my doctors appointment I see the scale climbing in numbers... Which I don't feel like I've gained as much as it says... But my doctor has not once said that my weight gain was bad at all he says everything looks perfect and healthy and he is pleased with my whole pregnancy so far... But I have noticed each time I go to my WIC appointment they always always comment on how high my weight gain has been... Now when I first started going to both different appointments I was so so so sick in the beginning of my pregnancy that I was loosing weight and was not even able to keep a glass of water down... I dont honestly feel like I eat much and am constantly busy doing activities that require me to walk and I live in a two story house so I'm constantly walking up and down the stairs which is very tiring... I was just wondering if anyone had any similar experiences with WIC?? Is there only a specific amount of weight gain I'm supposed to gain?