I took plan b on September 30 after having unprotected sex September 29. I am on a regular birth control and had been keeping track with it, I took plan b just in case because I was worried. My period was supposed to come December 5th and has not. I am wondering when it will come and do I still start my new pack of birth control as regularly planned for Monday the 8th even without getting my period or will this just delay it more?