Hormonal fluctuations causing vaginal bleeding

Given the data you provided, you might be experiencing vaginal bleeding due to hormonal fluctuations because of the emergency contraceptive pill. The emergency contraceptive pill was not necessary because you were only in the 2nd day from the start of your period. Assuming that the length of your menstrual cycle is 30 days, your ovulation occurs at the 16th day from the day the last period started counted as day one. If the bleeding lasts for a couple of days more, you might want to visit your gynecologist and have a pelvic exam and hormonal laboratory tests. According to the results your gynecologist might recommend a medication including hormones that will help stabilize your hormonal status.