I took Plan B 52 hours after my boyfriend and I had sex without a condom. He pulled out, but I got nervous and wanted to make sure. I started my period right before I took the Plan B. Then within two days it stopped. I'm assuming it is due to the hormones from the pill. I am starting my pack of Birth Control today. My question is, should I take a pregnancy test just to make sure? And when?  My doctor didn't mention taking one when I went to my appointment.