The fact that she has taken Unwanted 72 within 3 hours of unprotected sex gives her protection against pregnancy
Unwanted 72 is a preparation which contains reproductory hormones Levonorgestrel
. Hence after few days when the raised levels of this hormone levonorgetrel start dropping down, there is withdrawal bleeding which lasts only for few days. You do not have to do anything for that. However, if there is some pain in the abdomen, she may take antispasmodic painkiller to get relief.
Because of the pills and this bleeding, it is likely that her expected menses will be delayed by few days. Nothing to be worried about.
I hope this helps you.