Ate dinner at 6PM. I had the burger with onions and bacon. Had to heat the burger upon arriving at home since it was cold. Noticed no other problems besides temperature. Went to bed, began having cold sweats, fever and nightmares. Woke up with an intense burning in my stomach (not acid reflux) and nauseated. Vomited what seemed like the entirety of the burger. Stomach still burned after vomiting but nausea went away.