My first stall hit at 2 weeks post op and lasted about a month. Stalls are a normal part of the process. If the scale is making you crazy, stay off of it. Follow the plan. Trust the process. You'll be fine.
The pattern that my body seems to have settled into is, I lose about 3 pounds. Stall for a couple of weeks. Gain back 2 pounds. And then stall for a week. And then it starts all over again. I'm losing on average of about a pound a week. So the scale is going down, but not without going up first.
Your body is going to do what your body is going to do. If you're eating in a calorie deficit, you're going to lose weight.