Early signs of Parkinson's?

My father has had a noticeable tremor in his hand/arm for several years now, and his hands have been shaky since he was very young. In the past few years it's gotten worse (more violent tremor, his gait is different, balance off, etc.), and he's been seeing specialists about his condition. Now they're pretty sure he has Parkinson's. I know there's no conclusive evidence that Parkinson's is hereditary, but like my father, my hands have always shook slightly since I was very young. People have always asked me why I'm "so nervous", and I've had to explain many, many times that I'm not nervous, my hands just shake. It seems to be hereditary, but is it related to the Parkinson's? Could I be showing early signs of the disease?