Hi jo h
turnip and gus are right, that you can call the helpline in a situation like this. You can find the opening hours at parkinsons.org.uk/helpline. But do note, they are not an emergency service and it could take the nurse a day or so to get back to you.
If you need more urgent advice, you can now call 111 in England. Your GP may also have and out of hours service that can help.
I hope that you got the information you need.