I know that people are often prescribed weight loss medications after surgery, especially if they have stopped losing weight or if they regain weight, but I'm not a doctor, so I don't know if that's right for you. First, how long has it been since you last lost weight? Maybe you're just in a stall! Stall can last 3 weeks or more. Also, weight loss slows down as you get further out from surgery, so maybe your weight is just slowing down.
Also, if you have stopped losing weight because of psychological reasons, like binge eating or grazing, weight loss medications may not help, because most of them (not too sure about Victoza) work by curbing appetite, and if we are eating for psychological reasons, it's not really our appetite that needs control - it's our minds. In that case, you might consider seeing a therapist.
Again, having said all that, I think the first place to start is to see your surgery team and ask what they think. Good luck!