Well done on the 4lbs! That really is a good loss. LT say expect to lose a stone a month so if you lost that each week from now on you would still lose more than they expect!
Please, please don't be disappointed with that, you lost so much your first 2 weeks. Not many on LT have such huge losses all the way through their weight loss.
You are doing brilliantly and must feel so much better in yourself for losing so much already. Keep up the good work, you are doing fantastic and will be at goal in no time.