No, it's normal. And you should eat some bread or any other source of carbohydrates.
Chicken and vegatables give you stuff to build up muscles and cells and improving metabolism.
But to get energy (lift, run even fucking breath) your organism needs glucose, which it gets from carbs
I heard carbs had to make like 15% of your diet but i have no idea
Chemfag here, although not dietologist so don't know what your organism consumes exactly...