Can you have pregnancy symptoms while you not pregnant?

What symptoms are you referring to. A woman may have nausea and vomiting while not pregnant. She may miss her periods due to changes in weight or endocrine abnormalities. Her abdomen may be swollen from weight gain and fat accumulation. If you have a concern do a home pregnancy test.

Yes, symptoms seen in pregnancy are not specific to pregnancy and can vary from no symptoms at all to vague symptoms commonly seen in a variety of medical conditions.