I'm in that period where I'm weighing myself daily to gage fluctuations. I weigh first thing in the morning and periodically throughout the day, and WOW at the fluctuations. I think by Sunday I'll have a good take on how and why I get such huge drops or gains throughout the days. I tell myself Sunday morning is my official weigh in's and only use the daily morning weight to gage my progress throughout the week as it seems to be the most accurate. My point...don't worry too much, the fluctuation is quite normal.