Struggling with Work Trauma

A venty kind of rant for a minute because I'm struggling at the moment. I worked as a housekeeper from May to September this year and I think it genuinely traumatised me. I was treated poorly and overworked despite them knowing I was unwell and struggling. I knew it would be hard work when I applied, of course I did, but I didn't know they were going to treat me with so little respect. I was fired for not doing enough with the 'support' they gave me, which was a support plan that they did not follow. I have flashbacks to it, to the sadness and absolute misery I felt going in to work, the despair of it and the anxiety that rendered me unable to eat in the mornings and unable to think about anything other than the fact that I had to go in again so I couldn't go a day without worrying about it, without feeling so low that I almost didn't make it to the end of the year. I have flashbacks to being in the rooms, to clinging to my partner in the morning before leaving because I didn't want to go back there to an unmanageable work load to be looked down upon because I couldn't do the unreasonable amount they asked of me. It's stopping me from getting another job, from making a living and moving out like I need to. I'm at a loss. I'm disabled, made permanently worse from the work load, and have a host of mental health conditions that make life harder than it needs to be, and the flashbacks don't help. If I wake up at the time I used to wake up for work, I feel sick to my stomach, exactly how I felt then. It's like it never leaves my head fully and I hate it. I'm sorry for ranting but I have to get it out because it's making me feel awful.