emergency contraception
"After reading so many reviews in the past couple of weeks, I felt I needed to write one given my unusual experience.  I had unprotected sex the first week of December, I took Plan B within 12hrs and felt completely fine.  4 days later I bled very heavily for 4 or 5 days, and figured I safe.  Then my period never came, took 2 pregnancy tests both were negative but I got so paranoid once I was a week late I went to the doctor and had a blood test, also negative, but with still no period and "pregnancy symptoms" I was still very concerned. FINALLY 11 days late I started my period.  Plan B can definitely throw your system very out of whack, so moral of the story if you're anything like me try and relax!"