My 5 yr old son keeps complaining of his stomach hurting right around his belly button. When his stomach pain gets really severe he doubles over and complains of it also hurting on his right lower quadrant. He never goes without pain. He was recently in the hospital for the same thing and had a ct the ct scan showed an enlarged appendix measuring 7 mm. He is nauseated all the time has vomited and runs fever periodically. The ct scan that was done a week before the last did not show an enlarged appendix. I am at my wits end trying to help my son should I take him to the er at a childrens hospital?