Hallow Dear, The pregnancy tests on urine may give false negative results if performed too early, may be within first week of the missed period. So if you want to perform this test, please perform it on the overnight morning first urine sample about a week after missed period. Alternatively, you may opt for Beta hCG test. This test is highly sensitive and specific. It gives reliable results even few days before missing a period. If these tests report non-pregnant state, probably the cause for nausea and vomiting may be due to gastro-intestinal disturbances - mostly increased acidity in the stomach. Tab. Pantoprazole on the empty stomach early in the morning may help you overcome this. If needed, you may support it with Tums or Gelucil. Banana or Melon in cold milk helps to overcome the nausea even during the pregnancy. You may try this. Avoid spicy hot food. Chilled or cold food is better during nausea. Avoid fried food. Dramamine also helps to control vomiting. I hope this should help you. Dr. Nishikant Shrotri