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The common symptoms of pregnancy are missed periods;nausea;vomiting;low back and abdomen pain;dizziness;and sick feeling.If you have these symptoms then get a urine test done to rule out pregnancy.If the test is negative then your symptoms can be due to acidity and gastritis
for which you will then have to consult a doctor and get prescribed antacid like Ranitidine
and if you have nausea the even domperidone
and with these medicines you will be fine.