My child has started vomiting last night, and since then (now almost noon) she can not keep anything down (I have tried 1tbs of Pediatric electrolyte in about every 10 minutes, or Gravol, candy, she can not keep down anything). She is very white, and has not go to the washroom to pee since last night. What else should I try, how long should I wait to see a doctor. She is sleeping now. She does not have fever.