Mine was more a fairly well-known children's hospital rather than a primary care paediatrician, but yes. Anxiety, every time.
I remember the walk from the station, the foot crossing under one of the roads, then turning right down a small alleyway, through the square, and on the left. All this time feeling like I really needed to urinate (though I didn't), waiting surrounded by babies and their parents, waiting for my name to be called.
Up until 8 or so it wasn't so bad, on my next visit age 11 being told to undress down to my underpants and vest by the nurse as if it was a completely everyday activity to strip on command. Great tact for dealing with adolescents there - babies and younger kids were probably much more accepting.
Then in to see the doctor, looking at me over his glasses perched on the end of his nose, asking my mother if I knew when I wanted to go the toilet (aged 11 and continent), talking about me as if I wasn't there, before making me lie down and him pulling up my shirt and opening my trousers as if I was incapable, then pulling back the waist of my underwear at each visit to look at a healed scar from years before.
There were only two high points in all my visits there; once when the other parents and kids waiting all left to watch a VIP arrive, meaning I was seen and out of there much faster, and the last appointment twenty years ago when I knew I would never have to return.