Dear Dr.Jain , i am 25 yrs old female last dec 2010 and Jan 2011 i got my periods regularly within the 28 day cycle, in Jan 2011 i got my period on 25th Jan . I had unprotected sex wherein my partner came in me , i took the i-pill my date changed to 19th Feb , now what date should i consider for my period for this month of March 2011. Pls help?