Weight fluctuations are something completely normal. While yesterday, you were 1 notch lighter, tomorrow’s weighing might show you 1 extra.
Don't panic and be realistic and kind to yourself! Weight fluctuations are normal and happen for a number of reasons such as when you used the toilet, water retention, or depending on what you previously ate or drank. So just make sure to focus on how you feel (energy, mood, body) and aim not to weigh yourself too frequently – once a week should be enough.