I had sex on the 14th of February when the condom broke. My period, which is usually regular, was scheduled on the 17th. An hour after the condom broke, I took Plan B. It has been over a week and my period has yet to start. After I took the pill, I experienced slight nausea and headaches. Now, I am not feeling any pregnancy symptoms, however, I am experiencing slight discharge. Could I possibly be pregnant?