please help me!!! plan b & period?

Ashley
I took plan b 2 weeks before my period was supposed to come. I had the "plan b period" a week before my period/a week after I took plan b. Was I supposed to have my period immediately after my plan b induced bleeding??? Because I did not and I'm kind of freaking out !!!!! Thank you!!! I'm supposed to get my next period on the 17th according to this app.