Hello welcome to the health care magic. I have reviewed your query and here is my advise. You have used levonorgestrel as emergency contraceptive pill for twice within short duration. It can lead Hormonal imbalance problem as contain high dose progesterone. As the bleeding of period is since three week, your pelvic examination should be done. I suggest you to consult gynecologist for examination. Until than trenexemic acid can be prescribed. Hope I have answered your question. Let me know if I can assist you further.