hi..i've been worried coz i have my period for only on a 20 day cycle..it lasted for 5 days and also 5 days before my period i have taken maybe 2pills..im suppose to have my period this week but then it came up early about 2 weeks ago and during my period i havent experienced any breast tenderness..i only felt it just this week..is there sonething worong or mybe just some hormonal imbalances?? pls help..i was thinking mybe that bleeding was maybe an implantation bleeding or something..i am worried that i might get pregnant..thanks..