It sounds as if you've hit your first "plateau".
Weight-losers often reach a point where, for several weeks, nothing they do will move their weight. It's a normal occurrence, but seems to be a major factor in people just giving up.
It will sort itself out in a couple of weeks, but you might be able to help it along by changing your exercise regime, trying different foods than you usually do, getting more sleep, etc. Anything that knocks your body from its regular practices may help.
You may also need to adjust your food intake - you weigh less now, and so your body needs less food energy to maintain mass.
There is a good article on the website this forum is part of:http://www.weightloss.com.au/articles/w ... ateau.html