Need help with PIP appeal

Hi, I'm new to this and struggling to ask for help but I don't know what I'm doing. My anxiety is through the roof. I've been on PIP/DLA since 2011 for mental health problems and Rheumatoid Arthritis . Had an assessment in January and my PIP was stopped. I don't do myself any favours by not being able to let anyone including health professionals see how much I'm struggling. I got so low that I stopped going to all my appointments and was discharged from Mental Health and Rheumalogy for about a year. I've still been getting all my medications through my GP(apart from injections for RA) I rarely leave my house. Of course this was used against me because I didn't have much evidence of my conditions. I'm now back under the hospital but maybe too little too late. The report had a lot of inaccuracies and they basically didn't believe anything I'd said.
So I requested a mandatory reconsideration and I got the letter saying they've not changed their mind on the 11/4/20
As a result of now not receiving PIP my housing benefit has been drastically reduced (I think because my daughter lives with me) which Means I now can not afford to pay my rent.

Unfortunately I have to go down the appeal route and have just over 2 weeks till the deadline. I am terrified, every time I try to look at doing it I go into a panic. I've looked at the guide and get overwhelmed.
I would really appreciate any tips or advice on how to start, things to include etc

Sorry if I'm rambling on
Thank you

Hi Gordon,
Thank you I will try that.
Thanks