Help! Not feeling well....?

My grandparents are in town, and they took me to Macaroni Grill. I ordered the mushroom Ravioli because that what she ordered in Twilight, and it sounded really good at the time. But as soon as I got it, I remembered I absalutly hate mushrooms AND ravioli. (i know, i felt stupid) My grandpa said I had to eat it all because it was expencive. I can not stand mushrooms! they make me feel sick. I want to throw it up, but I cant get my self to throw up. what should i do?? gagging myself doesnt work. (ive taught myself not to) so how can I throw up?? easy tips?? and if not throwing up, then how do i empty my stumach by going to the bathroom? plz help! and also how do i select best answer? ill give you 10 points!