Remember that Plan B can make your cycle come earlier or later due to the hormones. If it is unusual for you to spot at this point in your cycle, keep and eye on it and test when your period is due.
My period last month started the 17th so not until then. & I took the plan b an hour and a half after the sex an he didn't finish. It's just weird...
When are u supposed to have ur period? I got pregnant even though i took plan b within 12 hrs of unprotected sex. Definitely keep an eye out for your period and take a test if its not normal