i had unprotected sex last night in 1st day of my period.i took emergency contraceptive pills this morning.bt my bleeding is nt as it was before in my periods..n i hve to suffer frm irregular periods most of the tym n this tym too..it is more than 5 days late..will contraceptive pill work?i hve heard there is a chance of pregnancy if period is irregular..is that true..m only 21 yrs grl n i dnt wnt any pregnancy in early age..how can i conform that m nt pregnant..plz help me..