Bathroom scales aren't precision devices.
Let me give you the advice my nutrition coach gave me. Weigh as often as you want, but pick ONE day a week and average the last week's worth. Then track your average. Because maybe you slid your scale and it's balanced differently. Maybe you ate something salty or drank a little wine and you're bloated. Maybe it's almost time for Aunt Flo to visit, or you overdid it at the gym, and are retaining water.
But the average won't lie to you. And so, on days like yesterday where I had a bunch of salty food for NYE and then weighed in heavy, it averages out over the week, and I see I am losing about 2 lbs. a week.