congrats... but...
unless you are very much overweight (and even then), 5lbs in less than 2 weeks is a lot, probably too much, you should be careful, you're probably loosing a lot of muscle there which will ultimate slow your metabolism and defeat your purpose...
go for a pound to a pound and a half a week, slow changes are maintainable and become lifestyle changes... if you loose too much too fast your liable to set yourself up for a nasty rebound...
there are no quick fixes or shortcuts to places worth going...
(it took me over 3 years to loose around 35-40 lbs... but i'm never looking back)