How can I make myself throw up?

Okay, so I realize that it sounds like I’m trying to learn how to be bulimic, but I’m seriously not. I just have the problem of feeling rather nauseus at the moment and have tried to make myself throw up so that the feeling goes away yet can’t. I know the whole stick your finger in the back of your throat deal, but it’s never worked or me. I’ve been feeling sick for the past 4 hours, bordering on vomiting, although never actually getting there. Help!!! Is there any other way apart from the finger method that I can try?