Okay... So I'm scared... I had unprotected sex with a guy around august... I took plan b maybe 5 hours after. We had sex when I was just beginning my period so I was spotting but not bleeding yet. The next day or two days later, I got the heaviest period since a couple months before I came off birth control and hadn't had one. At the end of September, my flow was light and only lasted 3 days... Which would be four weeks after I had unprotected sex so it couldve been implantation bleeding... I'm afraid I might be pregnant.