I know the feeling! It's TOM for me too, and I've been resisting the urge to consume my bodyweight in chocolate all day
If I know I have a weigh-in coming up during TOM, I try to drink a mug of hot water with lemon squeezed into it before bed. The lemon acts as a diuretic, so that helps with the water retention/swelling a bit. If you really don't think you're going to see any results until afterward, how about just taking a break from the scale for a few days?