Patient: Hiok so im 17 years old and i started my birth control the 27th of january. i started my period the 10th of janurary and ended the 16th of janurary. i had unprotected sex the 22nd of janurary but he didn’t come. i took plan b the next day just to be safe. is it possible that my period will be late since i didnt start it the first day of my period nor the sunday after. my period is suppose to come tomorrow and im not on the pills that are ment for my period time.