Wrong Day to Weigh

I've been feeling quite proud of myself and the way I've been controlling my eating the past few weeks. This morning I couldn't resist weighing myself (even after coffee) and was pleased to see a 2 pound loss since last Friday. The problem is that I'm not supposed to weigh in until tomorrow and I just know that 2 pound loss will disappear into the atmosphere and be replaced by a gain. It's impossible to gain even a pound overnight but we'll see tomorrow if I have achieved the impossible.