My 6 year old daughter came home from the first day of school with an upset stomach. She started having diarrhea and vomiting at 8 am this morning. I kept her home from school, gave her some crackers and sprite then she said she felt better. She had loose stools off and on all day then it seemed to finally subside. She began eating and drinking regularly. She went to bed at 10 pm then woke at midnight with poop in her panties then puked everything up she had eaten throughout the day. What do I do? No fever but gets chilled after she pukes and she said she is extremely shaky. Should I take her to the ER?