Hi, my one year old bumped his forehead 3 days ago around 9:30 am and later that evening around 7 pm, he threw up and has been hut only when he coughs. He also has yellow diarrhea, could it be related to the head injury3, he was around a child from his daytime that had the flu last weekend, he's alert but very cuddly which normally he is active. I'm not sure if the fly can last this long and his bump has gone away almost, and there is just a yellowish bruise now, is it likely he would be throwing up after coughing cause his bump? Or mire like the flu