Hi Justin, Welcome to Healthcaremagic Forum.
The bleeding which your Wife has had is the Withdrawal bleeding as a result of taking a Hormonal
. Not to worry, until the bleeding is severe and causes her to change her pads for more than thrice daily. It will subside on its own, she just has to get adequate rest and eat healthy nutritious balanced diet. She should see her Doctor immediately if the bleeding is severe with abdominal cramps and foul discharges. Her next periods might get delayed by 5 days to a week as a result of Hormonal Imbalance or may get them on expected date.