Its all down to own perspective, I started at over 14 stones but was still wearing the same clothes at well under 12 stones - because I couldn't recognise the change that everyone else noticed.
It takes a while for the head to catch up with the body - that is a frequently found observation on this forum, particularly because we lose weight quicker than some other diets.
Don't despair, feel very proud of your fabulous achievements so far and keep up your marvellous weight losses x