PIP Rejection and MR

I applied for PIP last year and got a rejection letter a few days ago. I did not get my report even though I requested it twice. I suffer with diagnosed ADHD, depression and anxiety and am in the process of getting an autism diagnosis.

I am extremely nervous for mandatory reconsideration. I wrote a 5 page letter and added a few pieces of evidence, stuff like dental records to show my poor oral hygiene, letters saying I have depression and anxiety and also my ADHD diagnosis and path forward for medication.

I knew they were bad for reports but I didn't expect this. I feel like a phone call wasn't even needed with everything they put in my report! Things like I was able to concentrate for an hour. I was a pure mess, hyperventilating and leg bouncing. I kept stuttering, apologising and referencing my notes. I scored 0 for everything which is so frustrating.

I sent off my evidence today plus the letter and I had even sent in my diary too. I got told to start writing one so it has about a months worth of entries in there.

I know its based on how my disability effects me, I am just looking for advice on this all.

I can only wait until it comes back and this might just be an anxiety thing. If it does and I get awarded, great. If I don't, I will fight this at tribunal. My questions are -

How likely is it that with all the evidence I have newly supplied will I get awarded?

Can I get someone to speak on my behalf at a tribunal such as the CAB?

Is it even worth fighting this much?

Sorry for such a long read.