First time PIP form - any in person support

Dear Community,

I finally received the form but somehow it only has 10 days to submission deadline.
I am looking for support preferably in person.
Most of what i am going through is not really visible. and also even though i am fluent i often misunderstand forms like this or even emails until later. 
I communicate better in person. 

Any recommendation where I can ask for help?

I have FND, undiagnosed possible dysgraphia /dyspraxia extreme fatigue, sleep issues, and falling asleep at random times, bladder and bowel issues,  weakened left side including some muscle loss, recently tennis elbow as a result of overcompensating for left side, diabetes, and my mental health is very much affected by all thats been going on - Its like there are days I can do everything perfectly fine but then cant even get out of bed for 2-3 day in a row.

Any advise would be highly appreciated

PS- if awarded - is PIP on top of universal credit or does it come under the same allowence.?