If you're stressing about the day-to-day fluctuations, I'd recommend not weighing yourself more than once a week. Consider it like a mini goal: To work at your weight loss / fitness as best you can for the week and then you get to hop on the scale and see what's up, sort of like a reward.
I tend to weigh myself every day because I can typically tell when that-time-of-the-month is coming strictly based on how slowly I'm losing, or even if I gain, because I know it's water bloat

But I'm also not bothered by the day to day fluctuations, so it's best to tailor your weigh-in schedule with how you feel emotionally / mentally and how well you cope with seeing the back-and-forth changes that are inevitable in a woman's body from day to day.