Confused and Discouraged

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So I've been working out and eating better for two and half months and I'm in better physical shape. I can go longer and be more active without getting winded, BUT my weight and inches on my waist never change.
Some mornings like this past week I wake up and the scale says 222 most days (12lbs from where I started) and it makes me feel good. Like maybe this is just slowly working, then other days I wake up and the scale says I'm back up to 230 and I wonder what I'm doing wrong.

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