Definitely if you become sexually active but if you go after you begin your first period it is unlikely that a pelvic exam would be done on you unless there is room for cause. Most docs, at least in my clinic, didn't do one unless there was a reason to e.g irregular period, severe abdominal pain, abnormal discharge, etc. They may do a breast exam but that is rare too. A lot of what I have seen is mostly educating you on your body and warning signs for potential problems.
The doctor will do a pelvic exam, this is normal. I found a link that answers questions about your first visit and what to expect. Good luck!
http://www.kotex.com/na/articles-info/going-to-the-gynecologist/10304