I hope all is well.
I'm sure you'll receive some advice from your fellow forum members soon, however, I just wanted to let you know that we have a lot of information on the Parkinson's UK website about the help and support that is available to you.
We have an entire section on 'Driving' that you may want to explore for information regarding the blue badge. You can find this information here.
Do let us know if you have any further questions.