Food Safety Reports: Subway, Foregate Street, Chester, UK

I went to subway on Sunday and on Wednesday I was getting bad headaches and pains in my stomach, on Thursday I was vomitting and have had severe diarrhea. One of my friends has had food poisoning from Subway before and I can't think of anything else it could be.  | Symptoms: Nausea, Diarrhea, Vomiting, Stomach Pain, Cramps, Chills, Headache