Hi,my sister woke this morning at 3am to go to the toilet,& after getting up felt extremely dizzy{this came on as soon as she got up-no symptoms yesterday at all} & bounced into the wall & barely made it to the loo. She felt she had low blood pressure,extremely dizzy{lying down or standing-which is worse,so has to lie down.She hasn t been able to keep any fluids or food down as she feels very nauseous,& tries to just have tiny amounts of water & small amounts of soup. Still has dizziness{all day}& feels very nauseous,& has to lie down if she s been standing for only a few minutes.I m concerned because she will get very dehydrated,& lose energy by not being able to eat. I m not sure if she has a superbug{cold/flu type thing with extra issues}but I m concerned as she is always fit,well & healthy. Any ideas? With thanks,Nick I am on a disability & can t afford to pay for this help.