Hi, I can understand your concern. Taking an emergency contraceptive pill is the right decision you have taken. However, these pills act by changing the hormonal levels in the body that are responsible for the menstrual cycles. They sometimes change the cycle. So finding some vaginal spotting or bleeding on the next day of taking the pill is a routine side effect of the pill. There is nothing to worry about. Your partner can expect normal menstrual cycles from next month. If she does not get menstruation, she should take a pregnancy test and visit a gynecologist. I hope this information helps. Thank you for choosing Chat Doctor. Let us know if you have any further query. Best,