This has a lot of the information you might need - http://www.medhelp.org/medical-information/show/2157/Attention-deficit-hyperactivity-disorder-ADHD?page=1#sec_3761
You don't have to go to a psychiatrist to get the diagnosis. An MD or a psychologist can also make the diagnosis as far as I know, but its always best to go to someone that specializes in ADHD.
Its too bad about your parents previous experience. All doctors are different, and they shouldn't generalize from one bad experience - particularly when its your mental health that is at stake. If you are thinking of college, there are some advantageous to having a ADHD diagnosis before you arrive. Of course, If you go to college (and are over 18), you can use on campus services to get a diagnosis.
No matter what you do, I think it would be worth your effort to find out more information on AD/HD. (the link above is a good starting place) If you have it, it doesn't mean that you have to be medicated. It does mean that with the proper information, you will have the knowledge to lead a more productive life. Good Luck, and if you have any more questions - please feel free to post.