My girlfriend and I had unprotected sex last month, around the 15th or 16th (about the time she has her period). She took a morning after pill the next day. This month, she started her period on the 15th, but she said it was light and didn’t last long. Does this mean she could be pregnant?
Source: http://answers.yahoo.com/question/index?qid%3D20120817123110AANMXic