Ive worked in this place for 7 months. At first, it seemed quite nice and friendly. It's a small team and we work with vulnerable people (who aren't residents/in care - don't want to say as too outing)
Anyway. About a month in, I started to get a bit nervous because of what I perceived as unethical behaviors - basic things such as GDPR breeches with non-password protected documents with personal info on, but also I found out that the professionals I work with are not under a regulatory body for the work they do. This is unusual in my line of work.
They also expect me to do things I am not trained to do. They treat it like a business rather than a way to help people.
I handed my notice in (notice period 4 weeks) this week. I am meant to be working (from home) today and I just cant bring myself to start. It has been making me throw up with anxiety for about 3 months now. I don't sleep through the night with anxiety. Even though I am contracted for 3 days per week, I am expected to respond any day to manager (including weekends) and to do work with clients on these days.
6 weeks ago my GP signed me off with work-related stress. No changes were made when I returned. No back to work. No discussion of why I was off.
I've had no reply to handing my notice in.
I was offered a job in a very reputable place this week - but it is dependent on 5 years of references, so including this role as well!
I feel unable to carry on in the role, but I am frightened that if I don't work my notice my manager will give me a bad reference/won't provide one and my job offer with be rescinded by the new organisation 
I really feel unable to work in such a way for a further month - the thought of it freezes me with fear.
I've never been like this before. I've worked in so many different jobs - from supermarkets, offices, to my current role in health. I am conscientious and hardworking, and just feel awful. The thought of my phone going at any minute makes me on edge from 8am - 7pm daily and only for about 2 hours a night I feel calm - then I panic getting into bed thinking "it starts again tomorrow"
AIBU to ask manager to reduce my notice period/not provide one?
No experience in doing this
always left work with on a good note and worried if i do leave if it will affect my job offer
help!