Hello doctor ! My girlfriend and I did sex in month of August and she took ipill, after which she got normal periods (on 24). In next month we again did sex 1 week prior to her date and she washed her vagina thoroughly with water. But now its more than a month and she hasn t got her periods yet. She is taking estil and progestil tablets. Today is the 3rd day of the dose. Still no periods yet except for minor stomach and head ache which happened the 1st day. Her pregnancy test is Negative by kit test. Kindly help us out whether she should have different medicine? If yes then which one ? Thank you.