Suggest Treatment For Heavy Menstrual Bleeding

i am gettin heavy bleeding in between my periods, i got my periods on 9th of this month, i had unprotected sex with my bf on the 19th, i did take an emergency pill (ipill) on the 19th, i started getting a pain while urinating on the 21st with small amounts of blood, and unprotected sex as in he didnt enter me neidr did he cum. now on 25th i am getting this heavy bleeding, why is it so ?