It might be due to constipation or some times low hb also does this,might be due to heavy bleeding
U need to consult first dear
Health Tips
1-if you don't have haeaving bleeding you can have jaggery with milk at night in initial days of yours periods.
2. you can do massage with mustard oil or any good ayurvedic pain relief oil in bottoms of your feet for 10 -15 mins whole mnth,it will definitely help