(((Hugs)))

I can relate to a lot of this. It's so hard to work when you are struggling. I admire that you are trying to take it day by day. So sorry to hear that there is a lack of support. Her behavior is completely in the wrong, and you don't deserve that. Be gentle with yourself. It is normal to feel anxious going back to work, although I understand it doesn't feel normal when you are feeling that way. It's one day and a time. You can only do so much, but with time, hopefully the job will get easier. If not, then it's time to evaluate whether it's a good fit or if it's time to look elsewhere, but there's benefits in giving it time and using self-care as much as possible.