Even knowing that fluctuations are perfectly natural, it's still disappointing to see a fluctuation in the "wrong" direction. I got better at dealing with it over time, and I've had *lots* of time to practice, but I'm still not completely free from the disappointment. I'm post-menopausal now so my fluctuations are a lot less severe, but they are still present.
That said, I still like to weigh every day and when the scale does fluctuate, it tends to resolve within a few days.
Hoping to earn the user name NoYoyoMa...