hi you didn't mentioned about your age.it is very importent! anyway you have 2 consult a gynecologist& do a TVS(trans vaginal ultrasonography
) to rule out PCOD
,DUB or any other cause also do thyroid
function test .you can take TRAPIC
MF tablets 1-1-1 for five days to stop the bleeding.but it is better to find out the reason early!