Welcome to the forum, Gerbera-girl!
I've had PD a long time, too. Though diagnosed in 2002, I've had it at least 17 years now. Tracing your case back to your teens is remarkable! (Not lucky, you understand, but remarkable) I hope your case is developing slowly; we all have certain things in common yet experience differences as well, particularly in rate of development and age of onset.
For me, medications have kept the symptoms under control. All I can add to that is a positive attitude and lots of exercise on a regular basis.