Nausea vomiting are the common symptoms in first 3 months of pregnancy. They are sign of growing pregnancy. Have dry Toast in morning. Take small and frequent meals. Consult obstetrician for medicines regarding nausea and vomiting. You should do Rh antibody titre after 28 weeks if your blood group is negative. And injection Anti D 300 mcg within 72 hrs of delivery if ghee blood group of baby is positive.