i had it done. it was a bit embarrassing but heck with my breast issues i've gotten over that. remember that the staff are professional and they've done this a million times before.

asking about the topical med is a good idea. without it there's just a bit of initial pain and it goes away quickly. they also put in a rectal tube when i had it done. just to do measurements which i didn't understand.

nothing hurt. the staff were wonderful. very helpful and supportive and my dr was great. it turned out i had a neurogenic bladder related to my MS and was tx'd with detrol with great success.

so, getting the needed info will help you tremendously in the long run.
keep us posted. i wouldn't say you had anything to be nervous about.