Thank you for asking on HealthcareMagic.com, providing better healthcare for you. I have gone through your case and I can understand your concern. Based on her history, vomiting may be caused from: 1. urinary tract infection 2. severe morning sickness or hyperemesis gravidarum, that affects a large proportion of pregnant women and it is most common during the first trimester. Both of them may require hospitalization and treatment with intravenous (IV) fluids and medications. Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health. Please don t forget to give your valuable feedback and five star rating, to help me assist you in a better way. Click at I Find This Answer Helpful too . Please, write a review about your experience with me.