HI I Ate A Kebab In The Afternoon From A

HI I ate a kebab in the afternoon from a place close to my house where we go often and eat at, today it was really warm in there close 40 degree, Also I felt a difference in taste ( as i know how it tastes there normally since been a regular customer) I already while eating it started feeling bad ate half of it and couldn't finish it which was unusual . When came home only in an hour or so started feeling pain in the stomach couldn't burp properly. went to the toilet a few times and then puked a few times as well. I feel better then before now but still have pain and been going to toilet again and again. what could this problem be and how long will this last? Thanks in advance