Last Wednesday, I threw up after eating hamburgers for dinner. I had chicken for dinner Thursday - didn't throw up. Friday: roast beef sandwich - threw it up. Saturday: steak fajitas - threw those up. Sunday: Orange chicken - didn't throw up. Sunday night snack: 2 Krystals - threw those up. Monday: Hot wings - didn't throw up. What is going on? Do I have some weird stomach flu that only makes me sick when I eat beef?!? Sometimes I have felt feverish/queasy but not like I have experienced with other flu bugs.