You reach into your pants to see what you have down there. You're still hoping to have a dick, but you're prepared for the worst.
Your hand cups around your package, same as it's always been, "Whew, that's a relief" you think to yourself. You take the time with your hand down there to start idly scratching your sack when you feel something else behind your junk.
You reach down and feel the odd feeling of a slit down there. Reaching down further, you can very clearly feel a hole. It's such a strange sensation, feeling body parts you aren't used to. The indescribable feeling of touching a hole between your legs.
You take off your pants and use your phone's front-facing camera as a mirror to finally confirm. Yep, you have a pussy. You're going to be stuck for the next month with girl's parts on top of your normal equipment.
You realize there's one person as important as you in this world, at least in terms of what anatomy they have. You quickly look through your texts to check what your girlfriend might have.