Yeah... I have had problems in the past.
I actually stopped weighing myself every week because it did more harm than good: I would weigh in and it was be like a half a pound too heavy so I would be depressed, and needless to say this would leave to more eating.
Instead when I started this journey I did measurements. It was less stressful, and surprisingly the inches came off rather quickly.
In the past 10 months I've lost 8 and 3/4 inches.... 3 of those have been from my waist. That is actually news to me. :O And it makes me pretty happy I have to admit

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I just started to weigh myself again... however when I know I've had a bad week or I think a weigh in will just add to my stress, I skip it. I know what I have to do to lose weight and I know what parts of my life get in the way (School) and I don't necessarily need a scale to be accountable.