I've seen somewhere online that typically the first 4 weeks of low carb dieters ends up at the same point of losing about 10% of what you need to lose (so more for bigger people, less for smaller). But some will lose a lot really fast then have weeks of no losses, some will take a while to lose anything, and some will lose moderate amounts but consistently.
I think keeping this is mind is a great way to commit yourself to sticking to the program for those critical first weeks (when most people give up!).
Your results are fine - but if you're worried you're done doing this right, feel free to post your menus here, there always things we can tweak and improve.