Hi, I understand your concern. - Vomiting in pregnancy is due to raised pregnancy hormones in mother s circulation-to which she is not used to.Because of the nausea, she can not eat sufficiently, gets weaker - making her concerned/ depressed about her baby s development- - In your case this has been aggravated by your GERD. - Zofran is a medicine to prevent vomiting,. It is not known to harm unborn baby- but is is not indicated in nursing mothers/ children under 5 years. - I would advise you to take pills of Doxylamin succinate + pyridoxin hydrochloride & folic acid preparation( Doxinate plus) 2 pills at bed time along with your GERD drugs, - Take small & multiple servings of food , avoid spicy/oily food. take plenty of fruits, vegetables, salads, milk( cold milk will be digested easily) be under a gynecologist s care & follow the advise given. Thanks.