You could shake up your physical activities routine a little bit. Drinking water more helps. Staying on track with the diet choices you already have made helps - then you just need to be patient, because it does take time.
You've already lost 11 pounds. That is great! At Weight Watchers, when I hit a plateau, I was told that eating more very lean protein (substituting it for some other food, not adding it to the diet...) helps. And it did. Also, that eating more vegetables and fruits (substituting it, not just adding it on) helps - and it did.
Those are carbs and protein. Fat is more than twice the calories, gram for gram, as either of them. So, if you see that in your meals, just be aware.