Sorry to hear shelz that you are feeling gutted. I can remember coming out of a diet club that I went to a few years back and I would often only lose half a pound. I used to ring my parents in such a disappointed state and my dad would say comfortingly that it was good, a half pound of fat permanently binned.
I also remember getting down to 9 stones 5 pounds back in 2004 and desperately wanting to be 9 stones, I remember it well because I had a new boyfriend that I really wanted to impress! And the weight loss was just the same as you - half a pound in two weeks. I did manage to lose a bit more but it took ages, and then new bf decided to take me on some romantic meals and it went straight back on, lol!
But in response to your dilemma, I can only suggest that you get advice from your CD counsellor as the best way forward in terms of how to budge the last pounds is truthfully beyond my basic knowledge of dieting.
But wishing you the best of luck in your quest x