My son is 14 months old. Insists in feeding himself. So no more baby food. His diet hasn t changed much this month ( bananas, melon slices, sliced grapes and sliced apples for fruits...cooked broccoli, green beans, carrots, peas, squash and sweet potatoes for veggies and chicken pieces peeled from a whole baked chicken, eggs, red beans, occasional toast with peanut butter and gerbers rice rusks or banana cookies for snacks. He drinks whole milk and 1/2 juice, 1/2 water mix four Oz a day. 8 Oz water at night (which he drinks all of it by morning) he chews on a frozen celery stalk or frozen fruit sometimes for teething, he never gets white sugar processed food. Could it be teething?