I know it feels horrible but you gotta look at the big picture.
Instead of using the scales as a progress chart this week, think of all the things you've done right. And you probably lost some inches somewhere that didn't show on the scales.
The scales aren't the only way to track your progress but unfortunately it's the easiest. Did you measure yourself yet? Maybe that'll make you feel better.
Keep up the good work though and forget about the scales!