Unprotected sex and havent had my period yet.

Patient: Unprotected sex and havent had my period yet.ho tri cyclen and have been for years now. On Saturday I took my last active pill and Sunday I starting my sugar pills. Monday night I had unprotected sex with my boyfriend and I haven’t had my period yet and I’m getting really worried! Could I be pregnant? Do I need to take a plan b or morning after pill? PLEASE HELP

Doctor: