First, it's TOTALLY normal to fluctuate daily... especially as a woman, I can weigh within 1-2 lbs difference on any given day!!! I'm usually within a lb- but certain weeks it can be more
Knowing this- I know that if I'm within that weight, I'm good. "Maintaning" doesn't mean your going to weigh exaclty the same each day- or even IN the same day. In the morning you'll weigh less, at the end of the day you'll weigh more. I absolutaly understand wanting to stay within a range- I do. I didn't weigh myself for years- and I slowly gained weight not even truly realizing it- so now, I do weigh myself every few days (just to "maintain" and keep motivated to do so).
Try to remind yourself of all this-- you are MORE than a number... it's what you see and how you feel that is most important. Maybe put the scale away- and only allow youself to take it out on certain days of the week (and in the morning)- at the very least, only weigh yourself at the same time of day, otherwise, it's not a true reading.
Personally- I used the Loseit app to lose the extra weight, PLUS, being on maintenance mode now I can accurately watch what I eat. tbh- I don't trust myself otherwise. I'm also not 20 anymore- so I gain more easily- but the app just helps keep me honest. I can still eat what I want- but I have to remain in my caloric intake for the day- and if I workout, I can eat more- so I workout 5-6 days a week- not just to eat more, but to FEEL better and healthier overall.
It's a process- not an easy one- but you'll get there... I would suggest little steps, don't go overboard and stop weighing- but find ways to cut back, and in time, you'll get there
Best of luck hun! And kudos for getting where you are in a healthy way- it's not easy.