Weight fluctuates throughout the day, and it has a lot to do with your bodily processes and your metabolism...I would suggest hiding the scale in a drawer so you're not constantly looking at it. You should really only weigh yourself once or twice a week for a number of reasons: one, so you're not constantly in a "weight" frame of mind (life is so much more than weight!), two, because you are only upsetting yourself with the confusion, and three, at the end of a week of hard work, you will be more satisfied with the numbers on the scale.
Having a scale is a wonderful thing, but it can also contribute to negative feelings, thus negative thoughts throughout the day, which can contribute to depression or even lead to an eating disorder. I went through this when I was losing weight as a teenager. I eventually had to hide my scale. I ended up losing more weight because I wasn't hopping on the scale multiple times a day and it allowed me to focus on life and save my weight-loss issues for meal times and planned exercise times. Hope this helps!