I understand just where you are coming from. I was DX on 7th March 2012 and my world just fell apart. However I am a practical person and looked up Parkinson's UK website as recommended by my consultant where I discovered that there was a local group and that they were meeting the following Sunday. Over the next couple of days I waived over whether to go or not; I imagined in my mind lots of people in wheelchair's shaking uncontrollably and was not sure that I would be able to cope with this. On the day of the meeting I recalled an old saying 'better the devil you know than the devil you don't' and decided to take the bull by the horns. How wrong my imagination had been, within a couple of minutes of arriving I had been introduced to 3 people all of whom had been DX up to 16 years previously and all of whom were walking normally, talking normally and not shaking. Yes there were 2 people in wheelchair's but I left that meeting feeling that there was a possibility of many years remaining active.
The group runs a weekly excecise class for PwP that is well attended and taken by a Physiotherapist and afterwards enjoy a cup of tea and chat. Being a mixture of people that have only recently been DX to people who have lived with the condition for many years there is no shortage of support and good advice.
It is a fount of knowledge and I have found that there is always someone in the group that can help. We all have bad day's and good day's, and it is the best tonic to be able to chat with someone who has been through what you are going through and offer advice.
My experience of the group has been nothing but positive. For your information my group is the Eden Valley Support Group.
I hope that you find this helpful.