don't want student doctor in my visits

Mama
I went to the doctor last week for my regular prenatal visit and my doctor has a student doctor gal tailing her at my appt, knowone asked if it was okay she came in to my appointment and normally I'm in and out but my doc let her measure my belly and find the heartbeat (took 15min+) I almost passed out when I sat/stood up from laying down for so long...I guess she's going to be there from now on and that's kinda annoying this is my 3rd pregnancy and I'm kinda not in the mood to be a Guinea pig, I know they need to learn but ugh I'm not really in the mood for it. I know the group b test is coming up and I don't want this chick starring at my asshole for 45min to learn how to swab a butthole 🙈lol sorry I'm so graphic! What should I say next time...I don't want to be rude and I'm kinda embarrassed to say I don't want a student in my appointments. 🤔