i made love (unprotected) with my bf on 14th Feb, nothing hppnd as suc h.. bt i got tensed nd took an i-pill after 48 hrs.. i was expecting my periods on 19th (as i hve regular menstrual cycle).. bt i dint get.. so i took pregnancy test on 20th morning. . it came negative.. i am having lower stmch pain.. nd mood swings.. its 23 .. still m nt gettng dwn.. any help to get my periods..