Thanks for posting.
From your description you are most likely experiencing side effects of combination of birth control pills and emergency contraceptives.
If bleeding continuous to be heavy, then I think you have developed a serious side effect which requires urgent consultation with a gynecologist.
While the chances of getting pregnant for you remains slim, it be wise to just do a pregnancy
test after a 1 week or so just to makes sure that pregnancy is not the culprit of your symptoms.
For now you need to stop any medications especially the oral hormones/pills. The bleeding needs to be stopped as soon as possible as that can get complicated;
Emergency pelvic ultrasound
might also be needed.
Hope this helps