Well I suppose it's possible, but I'd imagine in that amount of time of being exposed to the air the sperm would have died by then. As for your period, well you might want to get a pregnancy test just to be sure. And about you still being a virgin, well it depends on who you ask. Different people have different definitions of virginity. I personally consider penetration to be losing of virginity, so I say you're no longer a virgin. That's just me though.