I had unprotected sex, I am 40 with regular periods...I was on my last day of my period the day of unprotected sex. The next morning about 16 hrs later ,I took Next Choice. Nothing....then 3 days after taking Next Choice, My breast were sore, tired, and horrible headache for 3 days...Today I had slight cramping and have very little brown discharge . Will I have another period now since I just got off of my period?? Is this normal?