Gynecologist appointment

I’m going to my first gynecologist appointment. I’m super nervous! I’ve been through sexual abuse so it’s going to be tough. I’m pretty uncomfortable in my own skin tbh, something I’m working on, but I don’t like being naked at all, in any kind of way (meaning even just some clothing pieces or full blown naked, just any kind of exposure) for any amount of time. I don’t even like taking baths or showers (I do anyway! It just makes me uncomfortable) I’m dreading it! What can I expect. What ways can I make this process easier. Should I tell the doctor about my past sexual abuse. I literally know nothing about these kinds of appointments and no one to ask, so any information is helpful, thanks.