Coughing and vomiting should be considered as a respiratory symptom associated with a lung infection or cold. Coughing does not usually occur in pregnancy, and pregnancy is often characterized by nausea, vomiting, abdominal discomfort, and loss of appetite. If you are considering pregnancy, be sure to note when your last menstrual period occurred and whether you have a history of sexual intercourse. If you want to diagnose whether you are pregnant or not, you must check the blood HCG and early pregnancy ultrasound to further clarify. Therefore, coughing and vomiting are not usually pregnancy, but respiratory related illnesses should be considered.