So he says he's leaving, and then comes back? How long does he go for? What does he say when he comes back?
Your arguments - do they all revolve around things making him angry? (You being upset, the kids arguing). Do they happen over other things? Or are the arguments just him being angry?
What hours does he work? Monday to Friday? Shifts? How does he spend his days off? You mentioned you do 100% of the housework, so I'm just trying to work out if he works 12 hour days, 7 days a week, or if he does something else with his time outside of work that leads him to say he's always working.
I'm sorry to hear you're off work with depression right now, that's tough. From how you describe your days, you spend them helping in your husband's business, and then looking after the children. That sounds like it must have been a really heavy workload when you were going to work as well. I'm not sure how you'd manage to fit all that in and still have time to sleep. Or was it different when you were at work?
He tells you not to be a martyr when you ask him what it is he'd like you to do differently, yet he's the one who started by telling you you weren't doing enough. That's confused me, and I'm only reading your post, not living it. Have I understood correctly?
You're not being a martyr for responding to him telling you to do more by asking what he'd like to be done differently. That's a very reasonable course of action on your part. I'd have been quite upset to be called a martyr in your shoes.
It's really sad that you're so ill with depression you're currently unable to work - so you are as a matter of fact seriously unwell - yet you feel you have to hide it from him, because whenever you try to talk to him he turns it around and blames you, and makes out you are in the wrong. It's also sad that instead of receiving any support, you're running around after him. That can't be helping you get better.
Do you have anyone supporting you who you can talk to? Any friends or family who can support you a bit or be a listening ear? Depression is a hard, lonely place to be. I hate the thought that the one person you should be able to turn to for support is shutting you down and making you hide it. Of course you should be able to tell him how you feel, that's perfectly reasonable.
Samaritans have a freephone number now (116123 or email [email protected]). You don't need to be feeling suicidal to call them, you can just call them if you need space to talk about how you're feeling without being judged or blamed or having to hide it. There are some lovely, kind people there who will listen to you without criticism.
You've said more than once that you're not keeping on top of things. I think we all have different understandings of that. Could you tell us more?
For example, my doctor always asks me if I'm coping with housework. And I always get a bit embarrassed because I feel like my house is a tip and I'm not on top of it. Except I have regular visits from a support worker, and she always points out how clean and tidy my house is. Not even to be polite (and it is part of her job to make sure I am managing to cope with things like that, so she wouldn't lie to make me feel better). When I talked to them about it, I realised it's just that I'm too hard on myself and unrealistic, and actually I do a good and normal job of housekeeping.
So, what are the things you feel you need to do that aren't being done? Is it that you're only vacuuming once a week or fortnight but think it should be done daily? Is it emptying the bins when they're full rather than daily? What kind of things is it that concern you?
When you say your sick pay has ended, do you mean full salary, or do you mean you've been off sick so long you don't qualify for SSP anymore? I'm just asking to help me understand. It sounds like you're actually really poorly and struggling.
None of what's going on at the moment sounds conducive to you getting well enough to go back to work. Sick leave is meant to be about rest and recovery, not being run ragged and blamed for being ill. Losing your own income has made you much more vulnerable, and must have been quite a blow. I know when I was off work with depression it really knocked my confidence. How are you feeling about it?
What does your husband do to help you relax? What does he do to support you? What does he do to make you feel loved?
Your relationship sounds like quite a lonely place for you. Or am I off base?