Asktheexpert last month mere periods 10 October ko aane the but because of karwachauth i take medicine to delay my periods then my periods come on 13-14 October. But now 18 November my periods do this come i take pregnant test on 15 November it shows negative im not sure about prgancy what to do actually mujhe bahr jana h agar mere period 20 November tak nahi aate toh kya mai dubra medicine le skti hu delay krne ki