I recently scheduled my Pap smear with my doctor's office and realized there is a good chance I will be on my period at that time. Can my doctor do a Pap smear while I am on my period or should I reschedule?
I would recommend that you call your doctor's office. Ask to speak to a nurse or the doctor and inform him that your Pap smear will coincide with your period. You may be asked to reschedule, or be told to keep your appointment. In that case, the doctor will most likely check to see if the flow is light enough to proceed with the test.
Source: Pap Test." WomensHealth.gov. Mar 2006. U.S. Department of Health and Human Services. 11 March 2008.
http://www.4woman.gov/faq/pap.htm#pap06.

