Hi, if vomiting is leaving you weak, you must see your doctor. Drink plenty of fluids. When sleeping, keep your upper body raised, in the morning as soon as you wake, before leaving bed, eat 2 rusks or marie buiscuits.. have fruits, nuts, milk and a balanced diet. first 3 months, baby does not grow from mother's diet, so its not a problem for baby, but you should watch your health.. take care dear...