They don't believe me

I am sure that most people who I tell that I have Parkinsons don’t believe me.
Am I that good an actor?
Of course I do my best to cover up the outward signs. Don’t we all?
Even my boss of 15 years, during which time I have had less than 14 days off sick, thinks I am putting it on. To the point where he has had me sent to a private doctor… Who he expects to overrule a neurologist??
Five minutes inside my head and body would make people realise how hard I have to work to hide my symptoms.