Hi may be some stomach upset. Consult your gynecologist and take timely treatment.

This is not very common thing in third trimester so you need to just dive back and check what did you had for dinner yesterday and day after yesterday did you eat anything with your wife is allergic such as mushroom eggs olives or had eaten something of outside if everything is clear reports also normal and your wife is not suffering from blood pressure problems for low hemoglobin then I will advise you to see your gynecologist and do not delay it is not a very big problem but it is important to know the reason if everything has been normal since past 2 days and this is a sudden bout of vomiting with loose motion then it is important that you must start with oral rehydration salts and if vomiting is more than twice then it is important to meet your doctor and get a prescription of doxinate do not worry tag me and reply