Request: How can I detach from my work stress & start to balance my life again?

Hi all, I'll make this very quick.

I work in one of those 8-5 jobs for under £30k where clients ask the world, treat you like shit if they don't get their every desire fulfilled before they send the email, random teams calls & tracker after tracker after tracker. It sucks, and I am wanting to leave.

The issue I'm having is that I cannot shake off that stress once I get out of the workplace. I feel sick to my stomach and zoned out most days now, and it affects every single aspect of my life. I've become more reclusive, less passionate about my hobbies and whenever I think about taking time off - I worry about the size of my inbox when I return (as there's no cover for me). I don't have the energy to cook, clean, eat properly or even look for other jobs - I just sit there after work on the computer and try to distract myself from the world.

I am autistic with ADHD (diagnosed but unmedicated due to medical reasons) and there are no workplace accommodations whatsoever and it's swept under the rug, but I don't know what could help anyway.

I'm exhausted, I don't have any love for life or who I am anymore, and something needs to change. Any advice from those in the same situation/been there before? Thank you.