Every so often her tummy bloats up and she looks pregnant, she is 3, and at night she wakes up crying from pain, and when I go up she is on her tummy, all curled up and trying to relief the pain. She has been tested for Coelic disease which was negative, and the GP thought she might be allergy to milk, but its not all the time. I have to rub her tummy and it feels knotted. When I asked her earlier where its hurts she said tummy, and when I said here, just below her belly button, she fliched hard and said yes. WHat could it be??