Slow but surely, but mostly slowly

It was a bit frustrating; I did a mid-week weigh-in Saturday morning and had dropped two pounds. From Saturday to Tuesday I was under my 1700 calorie goal every day. Saturday I reffed basketball for about five hours, burning approximately 5000 calories according to the Livestrong.com Calorie Tracker. I thought at least another two pounds (maybe even 4) would come off from Saturday morning to Tuesday. Alas, it somehow did not happen. Instead, I barely weighed the same as I did Saturday morning, meaning I lost a total of 2 pounds (barely) last week and would therefore likely miss my goal of losing 20 pounds total in six weeks.