First of all, you don't know what you have lost this week, despite your strong feeling, so wait and see what the SW scales say.
Secondly, most people lose a lot in the first week and then settle down to 1-2 lbs a week, which SW (and other experts) says is a healthy rate at which to lose. It is sensible and sustainable - this is a plan for life, not a quick fix.
If you aren't going to be happy with this, then I don't really know what to suggest. Most people would be delighted with a steady 2 lb loss a week - this would be 8 lbs in four weeks, over a stone in two months, There are over 40 weeks till Christmas, that's 80 lbs, that's nearly 6 stone!