Greatest Game/Dannie/Reverse
No, no! This has GOT to be just some sort of bad dream. If that whole bit with the game-show thing was right, it also means you have to have sex with, like... elementary schoolers now, right? And get them PREGNANT too!
No, you can't accept that. You're a girl! You're not going to go around doing that! With a force of will, you make your genitals go back to exactly the way they were before. The change happens immediately and you rub your hand across the familiar folds of your vulva. Your hands are shaking a little bit from the whole strange experience of having just had a penis a second ago and what it might have meant, but so long as you're still a girl it shouldn't mean anything dangerous. Well, unless you try to have your little brother knock you up or something crazy like that.
No, not going to let that happen. Having resolved that, you pull your underwear back up and get yourself dressed for the day, putting on a short mini-skirt that you don't remember having but somehow strikes your fancy for the day. As you are leaving your room, a thought occurs to you. You should probably wake your siblings up, they normally aren't asleep at this time of day but they are for some reason right now. You're not quite certain how you can tell, but somehow you just know. So, first you should...