I don't take my weight too seriously starting a week before my TOM until it's over. My weight goes all over the place, normally peaking at about 4 pounds heavier than it will be the day after it's over. It's the only time that I might end up weighing less at night (after a day full of eating) than I do in the morning (if you're going to weigh yourself that much, please, only be doing it out of curiosity...if you do it because you spaz over every ounce, remove the scales from your house and use the scale at your gym, only).
The good thing, though, is I've noticed when you're eating clean the bloating you get is a lot less noticable than when you're eating whatever.