Try not to sweat it. I've gone in to docs before and said, "I'm so not ready for this, I don't even know what to ask you!!" they get it.
More than likely, the doctor will just want to do a visual exam at first. Meaning, he'll look at it. He might even put on the big magnifying glasses thingy. But for anything further, he'd have to discuss your options and make another appointment.
Let us know later today what he says!!