Trying melatonin

I was diagnosed with Young Onset Parkinson’s at the age of 51, and I have been living with the symptoms of young onset Parkinson’s for 7 years. I am not satisfied with the amount of sleep I am getting, and I am averaging 4-5 hours at night, and 1 hour – 1.5 hours during the day. My sleep patterns have changed since having young onset Parkinson’s – very restless. Sometimes my sleep patterns are affecting my partner.  The factors impacting on my ability to sleep include REM Sleep Behaviour, cramping, difficulty turning over in bed, Restless Legs Syndrome (RLS), frequent awakening, rigidity while in bed, tremors while in bed and pain. I don’t feel that any of the strategies listed have been useful or could be useful in improving my sleep patterns. I’m trying melatonin with little difference.