OK me and my boyfriend were having sex he you know what in me I took plan be right after I mean right away so a week later I started my period it was light but kind of flowing some days I lasted 4 days and now I'm kind of spoting I still have blood in their and it comes out hard some timesbut other than that I checked if I was pregnant it said no what do you think is wrong..? :confused:

Plan B or any type of emergency contraceptive is a RUSH of hormones through your body. The pill is going to throw your cycle completely off, and your body will take to adjust.

Could me many things

Stress causes issues

The plan b pill can cause the issues.

And of course the plan B is not 100 percent effective