hi doctor last month I went for papsmeer test because I was facing brown discharge problem when doctor done the test doctor taken brown discharge and they puted the discharge on the glass slide and they spray some thing .and they told there is no glands and problem in ur cervical.and they gave the report after 3 days .the test is negative.on that same day I got my periods.my doubt is periods blood can taken for the cervical cancer test ?? is it necessary to test again.