Hi..My Daughter who is 7 yrs old start having consistent pain around the belly button. it starts normally at 12 midnight and last until 5 am, she would wake up complaining about the pain every single hour for the past 2 nights, prior to that she always have episodes of vomiting bile plus stomach pain like 1 or 2x a month. we went to ER yesterday and they did not do anything aside from urine test which the doctor said is normal. they let us go because after 2-3 hours she was fine no more pain. the past 3 days of every night waking up in pain she was not vomiting any bile. what should I do next ? pls help