Need advice, struggling with part time job chronic pain and mental health

Hi, I feel a bit stuck right now and wondered if anyone had any advice.

I live with a chronic pain condition that has affected me for over 10 years. It is a women’s health issue which causes me lower abdominal pain and discomfort. After years of seeing GPs and being dismissed, I finally got a referral to a women’s hospital, however it is at least a 12 month wait. This past year the pain has become worse and it is really affecting my mental health.
I tried medication but had bad side effects and feel afraid to try other meds. The pain fluctuates and it can flare up and be very painful some days or weeks.

The mental health issues are affecting me a lot in my job. The job is completely overwhelming me. I find that I am so emotional and I just can't switch off from work. I feel anxious about going to work all the time and it makes me feel physically sick. I can’t focus on tasks and it has led to social anxiety. I can’t keep up with conversations or process things anymore and struggle with brain fog. It affects my mood too and I struggle with low mood and struggle to sleep a lot. Because of all this I make mistakes at work, forget processes, and just can’t keep up or take things in. It is a very busy, fast paced reception desk.

I have tried retail and cleaning jobs in the past but they are so physical it causes my pain to flare up and I need to be careful. Because of that, I found a reception and office style job the best for my body. However, due to the brain fog, memory issues, anxiety and depression, I just can’t do the work very well. I suspect I might have dyslexia too, which was never diagnosed, so it is like having all these blocks in the way.

I work 21 hours a week, which is all I can manage and even that feels like too much right now. I am struggling financially. I live at home with my mum, who is frustrated by me not working more hours, so it is a really stressful time for me. My health issue is so hard to talk about and no one really understands that I have told. I want to be able to move out and have my independence, but I don’t know how.

I don’t know if I am entitled to any income support, but I really am struggling and feel I can't work any more hours. I might appear fine on the outside because I am good at hiding it and putting on an act, but it is so tiring.

I need some advice on different financial support I might be entitled to. I also need help finding a new job that might be remote and less stressful. But I don’t really have many skills. I only do simple admin stuff. I am not good at maths, problem solving, or IT and due to anxiety, I find customer service more challenging now. It just feels a bit hopeless.

Sorry for the long post and to be so negative, I guess I needed to get it off my chest a bit. Thank you for reading.