The problem with germs of course is that you can't see or taste them and you are just as likely to pick up food poisoning from your own cooking as from eating out, in fact probably more so.
How many people know how to stock their fridge, for instance, or have work tops that would pass an 'elf 'n safety check (mine sure wouldn't) and don't get me started on bloody microwaves, these things have got to be responsible for more food poisoning than everything else put together simply because people don't use them properly.
Simple point being, don't always point the finger at last nights kebab just 'cos you are feeling a bit iffy, go have a good look in the kitchen and invest in a couple of thermometers, one for the fridge and another for the microwave!
Cheers
CoR