Late period from plan b?

Bout 3yrs ago my bf which is my husband now and I had a problem the condom ripped we bout plan b and I started my period the very next day it lasted for a week than when my normal date of my period came bout 2wks latter got that one and didn't have a period for a month but now I am ok also taking birth control is a life saver and regulates your period. Something to think about. i hope you feel a little relieved .