Doctor I had unprotected sex with my partner 5th January and get period 6th January for 5 days..after that I had no sex.also do 3 pregnancy test 17,22,and 28 days after unprotected sex and all negative.my expected period date was this February 6th but I get my period 2 days early and its stay 7 days.my period all time stay only 5 days and come 1 to 2 days late from expected date.so why my period come Early and stay long..can I need any treatment and urine pregnancy test??also