Fur,I weigh every day and I see massive fluctuations. I can weigh nearly 10 lbs more over just 2 days or nearly 10 less in just 2 or 3 days. I don't stress over the difference but if I see a 3-4 day gaining trend I'll eat less for 2-3 days or even fast a day to get back to my lowest weight over the last few days.