According to the data you provided you might be experiencing some neurological disorder. The data is not specific enough for definitive diagnose to be given.
However, the symptoms (hands shaking-tremor, hypokinesia and postural instability) might be related to Parkinsonsâs Syndrome. Parkinsonâs Syndrome has to be distinguished from Parkinsonâs disease, although it is the most often for reason for Parkinsonâs Syndrome.
Since there are many other causes that have to confirmed or ruled out, you might want to visit a neurologist for further diagnostic procedures.