I've done this one, where you drown in responsibilities and can't ask for help
Being main breadwinner and Homemaker is too much for anyone, never mind someone struggling with depression.
husband looks like he's doing nothing so ask him
If he's at home all day, then could he take care of the housekeeping?
It's not unreasonable for you to ask if he can have the basics done and a meal ready for when you get home is it?
and if he has time on his hands, then maybe this could be his chance to step up to the plate as main childcare provider
Your son, instead of losing a mom, he could gain a dad and you could gain a househusband, then you only have work to cope with,
could you ask him, would he go for that kind of thing?
it could be a positive change