Throwing up every few days for 2 weeks. er did blood test only and said she had bowel bacterial infection and put her on fluids. no antibiotics as was told she might get e.coli. is this appropriate?

Not normal: Vomiting every day is never normal. Most infectious causes of vomiting are viral and resolve within a week. Blood tests cannot diagnose bowel infections. Some types of bacterial bowel infection like salmonella are not treated with antibiotics unless severe. If vomiting persists, additional evaluation is urgently needed.

Vomiting: How old is "she"? E coli does not come from antibiotics. In most cases of gastroenteritis or food poisoning - antibiotics are not indicated and fluid resplacement is appropriate. However, 2 weeks of vomiting without diarrhea is unlikely to be gastroenteritis. That is a long time. Pregnant? Was the bacteria the found H pylori? If so, antibiotics are indicated in most cases.

Many Possibilities: There are a number of reasons for vomiting. May be something as simple as a stomach flu or potentially more serious causes. "Bowel bacterial infection" refers to a possible bad infection that usually does require antibiotics. Does not sound like a complete or thorough explanation.