Is it normal to be on your period again after you just have been on it a week ago plus taking a plan b pill on the last day of your previous period ?

Plan b : Irregular periods are one of the most common problems obgyns treat. If this is one time problem it usually resolves on its own. If this is a recurring problem you should be evaluated. There are many options available to help regulate the menstrual cycle. Plan B can cause temporary disruption. Schedule a visit.

Plan B: Very common for Plan B to cause irregularity in your periods. It should normalize over the next month.