PIP change of circumstance...confused!!

Hi All

I'm already in receipt of the standard rate of the PIP for care (nothing for mobility).

I was awarded it for 5 years and 2 years into this I contacted the DWP re change of circumstances (significant deterioration greatly affecting my wellbeimg and day to day ability. This includes new diagnoses/medical evidence sinse then).

I am under 6 specialists and have numerous medical appointments.
I am currently on ong term sick from work.

DWP informed me I need to complete a how your disabilities affect you form and I received the same form to complete all the information like when I first made the application.
I have returned this (on 23/11/2018) with a lot of new evidence including reports/clinic letters from all involved in my care.

I have recieved an appointment today for a f2f assessment on 31st January.

I have since seen information re it should be a different/shorter form for a review of award.

I'm now worried it's the incorrect process and it may mess my claum up.

Could somebody kindly shed some light and advise accordingly.

Regards

Thank you Gordon.

My confusion was due to being informed as well as reading reading on here re the AR1 form forchange of circumstances.

In which circumstances is the AR1 sent for? Is this the form used for when the DWP review the award when the period of award is coming to an end?