Wanting to throw up and not being able to do so could be pregnancy, but it could also be caused by gastroenteritis or indigestion, for example.
1. Pregnancy. Women who have sex without contraception during the ovulation period, after the symptoms of wanting to vomit and spit out is likely to be pregnant, usually also appear the menstruation stops, breast swelling or loss of appetite and other symptoms, but a single symptom can not be diagnosed is pregnant, but also combined with other tests to clarify.
2. Gastroenteritis. If the test is not pregnant, want to vomit may be improper diet leads to intestinal bacterial infection caused by gastroenteritis. Nausea and vomiting, bloating, abdominal pain or diarrhea and other symptoms will occur.
3. Indigestion. Want to vomit and vomit out may also be the recent diet irregularities or overeating, eating too much indigestible food to increase the burden on the stomach and intestines caused by indigestion symptoms, accompanied by abdominal distension and other discomforts.
There are many reasons for wanting to vomit and not being able to vomit, not necessarily pregnant, need to improve the pregnancy test to clarify the cause of the symptomatic treatment.