No you are not being childish one bit about the dentist thing. I am right there with you on the fear factor. Its amazing what we go thru and will do for our CP, but the dentist is whole different ballgame for me.
Its a real trip having me as a patient in the dentist office. First of all, my body never completely touches the entire chair lol. I am so scared my body gets so torqued I am nearly horizontal in the chair, no kidding. My blood pressure shoots up, I break out in a sweat and shake. My dentist always stops and lets me rest & calm down. I scare him as bad as he scares me lol. I have TMJ and its hard to keep my mouth open for very long. My dentist has me take a muscle relaxer and pain pill 45 minutes before my appt time.
I am so sorry to hear you need shoulder surgery. Lets hope & pray the surgery takes care of the problem. Hang in there.