And unless you have some medical reason such as some thyroid problems and problems or take binge eating then you get weight, than I would not worry about when your going up to few kilo because often your body regulating if you are normal weight.
And unless you have a medical reason such as thyroid problems or other problems or are binge eating which causes you weight gain, then I wouldn't worry if you go up a few kilo, because often your body will regulate that if you are a normal weight.