Leah, nearly everything i have researched up on says that having a pelvis too small, is a rare event these days, as nutrition etc is so much better than it once was, and birthing techniques are so much better than the old "you must lay on your back and stay on the bed,legs in stirrups, that our mothers had".
Trust your own instinct hun, because when it is all said and done, it is a decision that you have to live with and come to terms with later on. You can always try naturally, and if needed, know that a c-section will always be done if you cant deliver yourself.
I was not given the choice with my first c-section, and now, I have just found out that after 2 (I have had 3), none of the hospitals in a 200km (at least, havent gotten any further than that yet) will let me try for a vbac, as they arent allowed. I know that I will hav to have another one, but really wish i had not been coersed into the first by my obgyn.