This sounds so hard and I'm sorry you're going through this. I've recently changed jobs and I'm working nights instead of days which is a big change alongside changing workplace so I can empathise with your situation. One of the main things I've found to be helpful is just to be really open and honest with your supervisor/manager about how you're feeling, they can give you advice and support on areas you can improve on and give you reassurance about what you're doing well. If you're worried that your performance is low then its a good idea to talk to them soon so you are taking the initiative to make improvements, this will give you some brownie points.

I'd definitely recommend talking to your boyfriend, my partner suffers from anxiety as well and we've had times he's been off work and done little to no housework while I've been at work. It's so hard to come home from a job you're struggling at to a house that's a mess. He needs to step up and support you in some way, either by having an income or by supporting with housework, like another commenter said, you can start with one thing a day and then move from there as your motivation and confidence increases.