DLA to PIP

Hi, this is my first time here and I will try to keep my post as brief as possible.
When my son turned 16 he was told to move from DLA to PIP. He has Aspergers and anxiety disorder. I have been his carer for many years. We went along to the PIP interview and later received a letter saying that he wasn't entitled to PIP of any sort. I have had a mandatory reconsideration and this was also turned down. I have requested a copy of what his psychiatrist wrote.
Recently his pschiatrist took him off his medication after increasing it the time before! He became unwell and our GP prescribed him his meds once again. My son's dad told the psychiatrist and he reported me to social services for safe guarding! I have had social workers out etc.
I have been accused of wanting to keep my son in a "sick role".
I have lost my carers allowance and income support.
My son still needs a considerable amount of help and support. His disabilty didn't disapper overnight!
When he was approaching 16 someone came out from DWP to assess his need for an appointee. This was given to me however a few months later at the PIP interview it was deemed that my son could make complex budgeting decisions! There are many other things which I could add onto this post but for the mean time I just need advise as I need to apply for the appeal.
Regards