Could this been flu or food poisoning?

during Halloween 09 I asked my mom to get me burger king and I had to pass candy to little kids. My mom came like 10 minutes later.I was eating fries then 3-4 bites of burger it added me in the bathroom.Then next morning I was throwing up bad even if I eat some thing.Whole week I was throwing up from anything I ate.I had to miss school for 5 days