You aren't doing anything wrong! You've got to stay the course and follow what was recommended to you.
It's frustrating, but it probably won't be the last stall you'll experience. Our biology is built to protect our weight, not lose it. Most of human existence has been with scarce food, so your body does everything it can to hold on to fat and muscle out of survival. The surgery gives us some great advantages that help get past this barrier, but even it can't completely reverse 200,000 years of biology. It's a sucky answer, I know.
Your weight WILL go down as long as you continue to make good food choices. Your body is making all sorts of adjustments to it's surgery. Some people, the people who usually share their successes most online, drop weight quickly at the beginning, but that isn't everyone. It's great to see people's fast progress, but it's also disheartening for a whole lot of people because we think that dropping weight that fast is the norm.
The truth is, we all have our own "normal" when it comes to weight loss, even on this journey. Some lose a bunch quickly, some lose steadily, some lose very slowly, some lose and stall, lose and then stall.
Some people are hungry, some people aren't. The worst thing we can do is believe that we are doing something wrong or we aren't going to be successful. If we let ourselves get wrapped up that way, we stress, we get anxious, and that combination releases all sort of chemical signals that can slow weight loss as well. It ain't easy!!
Take this time to really focus on healing. When you start eating regular food again, use this time to build good habits that will last the rest of your life. As you continue to make these good choices, you will be successful. It will happen! You are just as likely in the end to reach your goal just as fast as someone who loses a bunch of weight up front. It will all work out for you.
So, I know it's hard to take comfort when things aren't going the way you want, but please stay on course. Stay positive. Continue to seek support from others. You can totally do this!!