Hi Chop Chop,
I'm so sorry to hear you are being messed about and confused. I think the medical profession forget sometimes, what a huge impact their words can have on people and they need to explain things more carefully and compassionately.
I would write down your worries and email your consultant. I find this is the best way to get a response to my questions. He should either reply, or arrange to see you again. Four and a half minutes is a ridiculously short time for an appointment......you need 20mins. at least.
Next time you go to see your doctor, neurologist or PD nurse, why not take someone with you. And make a list, beforehand, of questions to ask.
All the best and I hope you get some satisfactory answers.