Don't feel too disheartened with the 1/2 lb, it may be that you've lost a lot of inches rather than actual weight..I met my MIL the other day and she said I had lost a lot of weight since she last saw me, and when I told her I'd only actually lost a few lbs she said I must have worked my shape off going swimming etc then because she could see a huge difference..so weight isn't the only sign that things are going well.