Ok, enough Plan B.

You are protected during your placebo pills-- there's no need to take Plan B unless you've been making a ton of mistakes on your birth control pills, in which case you need to use condoms before sex.

It's possible you skipped your period, but you'll probably have some irregular bleeding or spotting during your next few packs. Plan B can take about 3 months to get out of your system.

Trust your birth control pills OR use a back up other than Plan B unless you absolutely need to.