My 3 year old grand daughter has had throwing up and diarrhea for 3 1/2 weeks. It may stop for a day or 2 and then start us again. She isn't eating or drinking but a handful of gold fish crackers and maybe we can get her to drink 8 oz of liquid in a 12 hour period. She has been to the E R 3 times and they just tell us that she has a stomach virus and is not dehydrated enough for an IV solution. She started having diarrhea again in the middle of the night and has gone 7 times. It is very watery. She now weighs 25 lbs. Is this nothing to worry about?