When I was in Paris last September I got food poisoning from a re-heated melted cheese sandwhich from a museum's cafe. I must have eaten it at about 3pm, went out for the rest of the day. Started feeling a bit queasy at about 11pm when I was in bed, and threw up first at 3am the next day. Then continued to throw up until 9am - for a full bloody awful six hours!
I remember lying out on the floor of the bathroom, crying and bawling and throwing up repeatedly, fluctuating between being absolutely boiling and freezing freezing cold! It was awful and something I never wish to go through again! Then at 11am I was due on a flight back to England, so struggled with an hour's trip to the airport, sat on the back of a suitcase whilst my boyfriend pulled me up the road, and to make things worse, my flight was delayed and I had to stay in the airport feeling like puking for almost 4 more hours, and then we flew and I threw up the whole way and then we landed in England I threw up some more. It felt almost constant for about 24hours. I genuinely thought I was going to die, and seriously that is not being over dramatic!