How long do hiccups last?

my son has been hiccuping & wheezing since yesterday. he is very sick and has been vomiting alot. we are in the hospital now cuz of this. but im worried that there is something wrong with his throat.He is wheezing and hiccup at the same time and his voice is very horse and he wont eat or drink( not even sip water) they did an X-ray and chest looked fine but he sounds very congested. there going to do an CT scan on the chest to check for aspiration. Plus he also has a horrible ear infection w/ bleeding. and im just wondering if the blood is draining down his throat. the doc just thinks its drainage but here's the thing no one has looked back there to see is anything is wrong. Maybe im just being a crazy mom, but i know my kid and when he wont eat or drink and when he cries from hiccups, SOMETHING IS WRONG!!!!! So does anyone have any advice for me.