How do i tell if my cold and flu is severe and almost reaching sepsis?

How bad are symptoms: Depending on how you feel will help determine whether you need advanced care or not (such as a visit to an emergency room or admission to the hospital). Influenza, or 'the flu' can be very serious. If you feel lightheaded, dizzy, or cannot keep food/liquids down, are getting dehydrated etc - those are things I would look for. Best next time to get the flu vaccine and limit the chances of being ill