I have been sick for 3 days. We went out to eat Chinese Friday I had shrimp fried rice. I thought I removed all the vegetables obviously not. I believe I accidentally ate a piece of onion now I have been so sick for 3 days. This happens everytime I eat something high in fructose. I get severe left upper quadrant pain it starts anywhere from 20minutes to 2 hours after I eat an offending food. I double over in pain sometimes my stomach/intestines cramp so hard I vomit. It is as if I had eaten poison. The severe pain where I have to lay on the floor lasts 3-14 hours it is getting worse it used to only be 2-3 hours. Sometimes I pray I will just die to end the pain. I have been to doctors they always say you have to live with the pain it is IBS and there is nothing you can do. I have explained it is so much worse when I eat fructose foods. They have never mentioned fructose intolerance to me I have come across this myself on the internet.