Hi my friend female, aged 21 years had unprotected intercourse on 31st September, however partner did not ejaculate inside. She even had ipill the next day i.e. 1st September just to make double sure. She had her period on 10 Sept and 13 Oct, but this month till today she has not got her period. Her last two periods were very painful. Normally she has painful period only but last two was even more painful. Her period gets delayed to 2 to 3 days, but this time it crossed almost 9 days and still there is no pre symptoms like pain etc. Please suggest.