I have PD, but no-one else in my family that I know of has ever shown signs, so looking for patterns may not necessarily be helpful.
PD has many different symptoms and everyone suffers with combinations of them. My main problem is cramping legs - particularly through the night when I wake because I am writhing about in the bed. I also have vivid dreams when I am shouting out and am woken by my husband.
Worst of all is the feeling first thing in the morning when my cocktail of medications has yet to take effect - my feet cramp so badly that they become completely distorted - clubbed - it is agony and can only be relieved by massage or in the worst case, Diazepam.
It sounds as though you need to be seen by a PD specialist who can confirm, or otherwise reassure you. If you are not happy with the Neurologist you are seeing, then ask to see an alternative one - you do have choices. Keep hold of the fact that the only one who knows your body is you and you are therefore in the best position to judge when things dont feel quite right.
Keep on it until you are diagnosed or given the all clear.
Good luck and hope it all works out for you.