hello my 11 year old son has been feeling sick and had belly ache for well over a month , he also lost hic voice completely 3 weeks ago, 4 days ago he vomited up dark brown vomit twice , he is waiting to go in hospital to have a camera put down to his voice box. today hes feeling sick complaining of stomach pains , hes gone from a lively child to one who lays down all the time , should i take him to hospital now