My LMP was on 25 aug 2010 . my periods are absolutely normal & timely appears after 28 days. on 10 sep i had an IUI & from 12 sep night onwards till next 15 days i have been prescribed one duphaston daily at night. My expected mp date was 22 sep , 3 days are exceeded still did not get my periods . What should i conclude ? am i pregnent or its bcos of duphaston periods are delayed.