I am so sorry that you seem to be getting such a raw deal, but I am sure you will feel much better as soon as they find out what medication suits you best.
Certainly you should follow Rams 57 ' s advice about contacting your local Parkinson's group, which may be able to give you some practical help.
It must be hard coping with 3 little girls under the age of 5 when you are feeling the way you do. Are there any friends or relatives who could come and give you a break during the day, so that you could try to rest?
I really do hope that they will sort out your medication, so that you can regain a semblance of normality. It will be good when at least your neck problem gets better.
Do take care and best wishes. Do keep in touch.