I would tell you to put on a gown with nothing under it and leave the room while you put it on.
I would take a stethoscope that has been kept in a fridge to keep it extra cold, and move it around several spots on your back through the open back of your gown. Then I would put it down the front of your gown, on your breast close to your nipple. Then I would put it on your nipple.
I would apologize that my staff forgot to take your height and weight and blood pressure. I would make you walk back out of the exam room, still in your, back down the hall. You'd have to walk past the waiting room, and everyone would see you in just your gown. There'd be a few young men your age in the waiting room, unable to resist staring at you as you try to keep the gown from coming open. You might even recognize one of them from school.
I'd make you sit down in a chair that is visible from the waiting room, facing the "audience", as my nurse takes your blood pressure and draws blood from your arm. You will then have to stand on the scales to be weighed and measured, with your back facing the waiting room. They will all see your cute young butt peeking out the back of your gown.
Back in the exam room, your legs will be put up into stirrups, and your feet will be strapped in so you can't get away. You will be given a vaginal exam with a speculum which, like the stethoscope, is very cold.
While you are still in the stirrups, you'll receive an enema. I'll pull your gown up over your belly so I can massage it during the enema. You will eventually be let out of the straps to go to pass the enema out of your bowels, but you will have to walk back past those guys in the waiting room again to do so.
With your asshole all cleaned out, it will be time for the rectal exam. You will be told to get on the table on your hands and knees. Your hands and feet will be strapped down to keep you from getting up. As I start to lubricate your little butthole, you will struggle and protest and in return you will receive a spanking.
To keep you quiet, an bit like the kind horses wear will be placed in your both, and strapped tightly with a rubber strap around the back of your head.
Your poor helpless asshole will be throughly examined, and while doing so with one hand I will massage your clit with the other until you come, your orgasmic moans audible through the bit in your mouth.