Firstly, please do phone the helpline above. They can advise on every aspect of Parkinsons.
You do not mention a neurologist. Ideally your specialist should be a neuro.specialist in movement disorders. Most GP's would admit to knowing very little about the management of PD.. Anxiety is very common in Parkinsons and sometimes pre-dates the diagnosis. Most people, at whatever age, are very shocked at the PD diagnosis and your mother may be sparing you the worst of her fears especially if like me the only person I had known with PD was my mother-in-law years ago when the there was no treatment. Today, seven years from diagnosis and now 76, most people would not know I had PD.
Best wishes,