i got my normal period the 30th of september .. had unprotected sex within the week of nov 6-11, took a plan b right after the inter course and got my period again 17-19 meaning i wasn't pregnant .. i'm suppossed to get my period the 15 and it hasn't come , is this normal when you take plan b for first time ? please help i'm nervous because i am not on birth control anymore and worried i could be pregnant from after using plan b and proceeding to have unsafe sex (yes i'm aware of consequences) just wanting to know if plan b can throw of your period ???