While most women naturally experience some nausea during pregnancy, especially in the first trimester, a few women suffer from severe nausea and vomiting, sometimes the entire nine months. If you are barely able to function because of nausea and vomiting, don't suffer in silence; let your obstetrician know. You may have a condition known as hyperemesis gravidarum. What Are The Symptoms Of Hyperemesis Gravidarum? In addition to non-stop nausea, you may vomit up virtually everything you eat.