My boyfriend and I went to a party Tuesday night. He did not drink much but on the way home we picked up mcdonalds. He ate one chicken nugget and said he did not feel well. He puked at 6:30 this Thursday morning. All Wednesday he suffered from nausea, headache in the front of his forehead, and has been getting hot flashes. His vomit was yellow. Any suggestions as to what it could be or what to do would be very helpful. Thank you!