Hi andilou, I just wanted to say that I have gone through phases too and coming on here has really helped me keep going. You've lost eleven pounds in seven weeks and that's great. I bet it wasn't exactly hardship either!
So just think, if you get back on the wagon now, you'll start the new year over a stone lighter than when you started. And in early 2010 you can shift ALL the weight you want/need to. Next Christmas you will be wearing the clothes you want and everyone will be telling you how AMAZING you look and are (in fact, that will happen well before next Xmas)
Don't beat yourself up about the two weeks you've been all over the place. We all feel like going mad from time to time. As long as you get your act together now, you can rein it all back in. But do try to rein it in TODAY and definitely go to to your weigh-in, regardless of how you feel. Otherwise you risk undoing all your good work.
You can do this!