I don't count, even on fast days, just aim to consume as little as possible in one evening snack-sized meal, well under 500, but I wonder if this might've crept up sometimes. Possibly what made the difference was a two pronged attack to cut out ALL milk in coffee during the day, and -- even harder! -- to stop having even two tablespoons of red wine with dinner (which tends to lead to another two...) These things both keep me really focussed now, too.
Anyway, whatever the reason, so happy to be back on the downward track again. So don't give up!