Weight Flucuations

So I've been logging on MFP for 30 days now (breakfast only on Easter, too many recipes I didn't make to log). I've been tracking my weight daily since the 15th on a spreadsheet (with a graph!) to see the trend. I only update it on MFP on Tuesdays since I started on a Tuesday. I've noticed that for the last 2 weeks, I weigh in on Tuesday and lose weight all the way up until Monday morning. Then it goes back up. Stays the same for Tuesday, and starts to go back down on Weds mornings. Last Monday I went back up 3lbs, yesterday only 2, so I'm still losing, I'm down 2lbs since 3/1. I know it's slow & that's fine. I'll lose almost everything I want in about year this way. Only have about 30 to lose. It's easier to stay on track if I don't make a drastic change from the outset. I guess my post is just wondering if anyone else has seen such a regular trend in their own daily weights. Just seems odd to me that it reliably goes up on Monday, and down Weds-Sun. I don't really do anything different on the weekends, just eggs for breakfast since I'm home & usually not a salad for lunch like at work. Still within my calorie goals. Except for maybe Easter. I'm sure I went over & I'm ok with that. I was back on track yesterday & today, so I can live with a holiday. They don't happen every day. Two weeks seems like a smallish amount of time to see a trend, but I'm pretty interested to see if it continues.