Weight loss progression after RNY

Hi everyone. I just found this website and group and think it's great there is something like this! I have a question/comment. I had surgery 4 weeks ago and in the first 2 weeks I lost 18 pounds. In the last 2 weeks I have lost only 2 pounds. I can tell in my clothing that I am getting smaller, but would love to see the scale move. Has anyone else experienced something like this?