I agree with farmergirl, in that it was a standard childhood exam... and maybe since your mom WAS there, the doctor felt less of a need to tell you/ask you about what was going to take place next-- maybe he thought your mom already explained the whole "doctor process" to you. Though, with that said-- I think a doctor should ALWAYS say what they are about to do-- even if the parents are there. that is a bedside manner that should not be absent -- ever.(IMO)
it sounds like you are quite sensitive about such things and that's OK-- we're all different. In knowing this now and you being an adult-- you can request to your doctor that he/she announce to you EVERYTHING they are going to do BEFORE they do it.....
it is your right as a patient to be in control.

...
and now being an adult....
there is NO reason to not be in control at the doctors.
best to you


fins