You have used emergency contraceptive pills.
It has high dose of progesterone hormone.
Withdrawal bleeding that occurs after these pills is quite erratic,it can be early or late and it can be scanty or heavy.
Next Steps
If bleeding is more than 50 ml per day, means if you need more than 2 sanitary napkin per day, it's heavy bleeding.
Please seek prescription support from your treating doctor for Tranexamic acid and Mefenamic acid combination tablets to control the bleeding.
Health Tips
Emergency contraceptive pills should be taken with medical guidance, not more than once in a year.
Please get proper sex counseling done about safe and protected sex activity.