American college of obstetricians and gynecologists (acog) recommend that women have their first pap test at age 21.
Previous guidelines stated that it be done 3 years after intercourse. This is not always the rule, women who have other factors such as trauma, being immunocompromised
and many others have a different time table of being checked. Please contact your doctor to see what fits you best.
Answer assisted by Saurabh Bajpai, Medical Student