I hve irregular periods.i have polycystic ovary.i am 79 days late.i took a pregnancy test at 57th day..it ws negative. am i pregnant.i hv sme symptoms?

Pregnancy unlikely: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early. If worried, can do one more test.