virginia's weight loss

My weight loss has stopped. I was told I would 100 pounds over the course of a year after surgery. I have only lost 30 pounds I am eating fish, chicken, no carbs, for fats mayonnaise, salad dressing. I drink plenty of water. haven't been eating vegetables. eating a little bit of fruit. I am exercising krav maga and cardio 3 times a week.

I am 4 months post op from having gastric bypass surgery I have only lost 30 pounds I am trying so hard to loose weight. I am eating only protein and excising to the best of my ability. Why is the weight coming off so slowly?? I have to loose 100 pounds. Should I be worried???