Listen, you're not losing weight at the moment, which means you're not in a calorie deficit. Your coach is going to ask you to reduce your caloric intake soon to rectify the problem, and he won't ask you to get rid of protein or fat - those are the essential macronutrients. He'll ask you to cut down on carbohydrates. And you can expect him to reduce your calories even further in a couple of weeks.
I'm sure you're healthy and good looking compared to most girls, but 5'7" 155 pounds is borderline obese in a bikini contest. Carb cycling may not be in the cards for you. But why don't you ask your coach and see how he feels about it? After all, you're paying him a lot of money. And he probably knows a lot more about bikini contests than anyone in this forum.
Sorry for being a douche.