Stay home moms

Little rant here: I'm a stay home mom of a 3 1/2 and 2 1/2 year olds and 32 weeks pregnant (crazy I know). My problem is I feel like my husband goes to work comes home does what he has to do and I'm just expected to keep taking care of the kids until bed. Also I've been lacking in my housework because of lack of motivation and energy. I just feel like my husband and I have a different view of the role of housewife and I get really nervous that if something were to happen to me he wouldn't know where to begin with the kids. Anyone else in this boat or have any advice?