i need some advice and help for up coming pip tribunal

i have a tribunal coming up and the dwp tried to oppose this and sent a huge load of paper work to say why it should be opposed however we still have an appeal date in 2 weeks time. i first applied for pip in 2022 under mental health grounds for depression and anxiety i tried filling in the forms myself but not in great detail - my son at the time was under going assessments for autism and adhd and it wasnt until he was diagnosed that it occured to me actually i think this is also me and explains why i have struggled my whole life. turns out i was diagnosed with adhd and im awaiting an autism assessment as well as mixed anxiety and depression as well as PTSD from childhood trauma. obviously because i was late diagnosed the medical history surrounding this wasnt great and the gp in 2022 actually only gave one word answers to the "facts" sheet he was given to fill out and he had only seen me once or twice regarding stress, anxiety and depression in 2022 and needed a sick note which then required me to leave my job as well as the other 5 jobs id had previous to that. he also got dates wrong about when i had started antidepressants which i have seen myself on my medical records and because of the lack of detail and lack of understanding about myself at the time of the first pip form in 2022 compared to the form filled out by my mam in 2024 with more understanding about my conditions and struggles ive had my whole life in everyday scenarios they have said some things are inconsistent and actually used phases which i felt like they are calling me a liar and theyve only had 1 telephone call with me (how could they see i was frantically biting my nails and pacing the floor an my heart racing due to anxiety and stress) and said i was "fine" yet just prior to this phone call id had a meltdown and snapped at the lady who called to say my appointment was going to be late and leaving my mam apologising for the behaviour due to the sudden change caused the meltdown. basically id like some advice on how i approach explaining the struggles in daily living when theyve claimed i do not struggle at all yet they do not know me and do not know how my condition presents and affects me, i feel i can type or write how i feel better than being able to talk because my brain goes too fast for whats coming out my mouth and i cant think of what is next to say and i go blank or get distressed and hysterical. i just dont know how i explain that i hyperfocus on caring for my disabled child and explain i was terrified to admit how much i was struggling to anybody when i wanted to die but the only thing thats kept me here alive is my child. i dont know how to say without the huge amounts of guilt and shame that i was too fearful to ask for help because i didnt understand i had an underlying disability myself and i was scared someone would take my child away from me and he is the only thing i ever really do right and fiercely. how do i present my struggles with life when all of my life youve been labelled different things like lazy, messy, rude, blunt, miserable, talks too much, doesnt concenrate or pay attention and then you get some one who speaks to you once on the phone telling you youve basically managed through life this far so your struggles mustnt be true as they believe you can do these things.. its hard enough feeling like youve been an imposter your whole life causing significant internal turmoil and torturing yourself and really trying to do your best and masking your struggles to strangers but only those extremely close see the mask removed. i really hope someone can help me. i dont really know what i need maybe just some clarity on how i write all of these things and present them when i sturggle to talk to people i dont know in an environment i wont be familiar with. i hope this made sense as i know i flit between different things however in my brain flow they all triggered a different thought relating to what i was writing. thanks for reading if you got this far.