Welcome to health care magic.
1.After I-pill / emergency
contraceptive medications all the symptoms you have mentioned are generally seen.
2.The side effects of the emergency contraceptive medications are irregular cycle initially.
3.The pain and bled is effect of the medications causing contractions - can be seen initially for couple of days and relived.
4.But in long run, emergency pill is for emergency, if you use as frequently - there are quite a few side effects and difficulty in future conceiving.
5.If symptoms persists - recommend to get a pelvic
ultrasound to evaluate any underlying pathology.
Good luck.
Hope i have answered your query,
any thing to ask ? do not hesitate to ask.
http://doctor.healthcaremagic.com/doctors/dr-ganesh/62888