Dear sky123 why do you want to convince her?
She is the only person allowed to decide what happens to her body. If she decides to have only a breast exam so fine. Why do you want her to have à pelvic? If she is not in full confidence with this Dr there are to ways. Either change Dr or go there from time to time to learn him/her better know. There is no reason anybody should force or try hard to convince her to take her panties off. It is her body and only she knows what happens in her mind.
It is also up to her to descide if you are with her during the exam or not. You should again not force her.
In my case I decide exactly what happens to me and my partner is always with me at any Dr. We discuss before we go what is accepted and what not. This only because I know that he stops the Dr if he wants to do something on me that I do not want, aspecially when I am in a stade of me fealing not 100% sure. If I would not be sure that my man supports my descissions for 100% he would not be with me.
I remember my very first gyn exam where I really was happy that he was with me. He stopped the gyn doing things I did not want. I am sure if the gyn had done what she wanted to do I would have never ever gone back to any gynocologist. Women can become 70years old whithout annuals, my mother is one of these examples.
I do not say there is no use of gyn exams but every women has to descide on her own when and how often she will have one.
You as her young husband are certainly very scared that something is wrong with her. But be reassured in 99% of all gyn exams nothing is ever wrong. As the elderly woman 😄 bemow said veryy few women reach orgasm during intercourse. I am "much" younger then her and I only reached orgasms during intercourse a couple of times. I believe it is becomming better with age. So do not worry, exercicing is plessure !