My Gf is still not getting her period she is not pragnant,i took 5 test on praganews kit,it's almost 15 days late.she also visit to doctor and give some tablt to take,she also took misoprotol for satisfaction ,but still not bleeding ,why? and she some clote blood comes out when she take doctor prescribed tablt,Is anything to worry for clote blood,and previous period also not proper only 3 days small bleeding and then stop on 4th days and again bleed on 5th days but this month still no period,Why