Just normal... Also weighing yourself daily is never recommended...
My friend just had her 4th baby & put on 31kgs, she is really short & really quite thin, but her body has gained excessive weight with each of her kids & she loses it quite quickly, her body just needs that amount of weight to be able to carry & birth a baby!

Most persons gain about 12kg-15kg (some less & some much more)

But it is all normal, I am almost 17wks & have gained about 3.5kgs!!!