I've been on a low-carb, high-protein diet for like 4 months now and I've lost 30 pounds. I'm a lot bigger than you, though. I started at 250. It took me like a month to start seeing the weight loss. And it really didn't start kicking in until I added resistance training and cardio into my routine(:

I wouldn't panic or anything! There's lots of yummy stuff you can eat, and my dietitian has taught me that it's really about the net carbs, so even if something has like 30 carbs, if it has like 45g of protein its ok to eat!