Hi Doc, i had an unprotected sex with my girlfriend last month of 11/18/12 which i m very sure of, but she claimed it was 11/11/12. before intercourse she stopped ovulating 5 days prior to the said date. Either way, she was in her safe period, she now say s she hadn t had her period which should be due today 12/9/12, i would like to know if it s possible she may be pregnant? thanks. From John.