after having the post coital contraceptive
pills it acts by intiating the forceful contractions and prevents in the implantation
of the embryo formed by the conception into the uterus
wall i.e. endometrium resultiing in the bleeding. that should be similar to normal bleeding cycles as occurs in the menstrual cycle. but if as you are saying that the bleeding is heavy and its almost 10th day. which is not a good sign because it may lead to hypovolemia
and you may experience low blood pressure and weakness. therefore you should consult your respective gynecologist as you may require some immediate treatment like FFPs to stop your bleeding.
and your next cycles will be according to the dates corresponding with the current bleeding cycles
thankyou with regards from
get well soon