Okay, I have been on the nuvaring for a little more than half a year now and I have the Friday insert and remove schedule. It was three days before I was supposed to remove the ring and wait for my period to come when my boyfriend and I had sex. I kept the ring inside for a while but then it irritated me so I took it out. I placed it in a napkin and set it to the side, but it was accidently thrown away. Its been out for more than 3 hours and I'm really worried that I might end up pregnant. What should I do? Should I take the plan B?