I'd say it's possible you have a neurological disorder. Now, before you begin any upset, there should be nothing to worry about if my assumption is correct. Most neurological disorders can be tamed with medications.
Parkinson's can occur at any age. However, a daily dose of L-Dopa would make your body just as normal as anyone elses. It is a possibility that you lack Dopamine in your body.
Do you have any times when you feel as if your body isn't moving as fast as you feel it should be? This is also possible Parkinson's disease symptom.
If anything, it is simply a chemical imbalance, which millions of people have, including me. No worries, and good luck at the doctor's office :]