15 pounds in a single week is nothing short of astonishing. Well done mate.

It won't always come off that quickly, though. For most people it becomes a bit of a rollercoaster ride over time, with periods of success interspersed with stalls and maybe even the odd rebound or two. Your patience will be challenged at times, but those times are what places like this forum are here for.

There's plenty of reading around here, so take your time with it all. You might find Ken's journal particularly interesting, as he started at pretty much the same weight as you, but is maintaining at less than half of his original size these days.

Good luck!