OK, a couple of thoughts and forgive me if I am wide of the mark.
If it is a question of having time for yourself (and you can't imagine how tempted I am to type me-time there ) then you could try scheduling that into the diary. By which I mean, make yourself some time, get some childcare and just switch off from the demands of blah blah blah and go and sit in a cafe and read a book or whatever it is. And do it regularly and absolutely do NOT allow yourself to feel guilty about it. because I think that might be the problem - because you are away from dd during the day you fell you "Ought To" want to spend time with her at the weekends or whenever your time off is. Well, if you need time to yourself, then having time to yourself will make you a better mother. for sure. but what won;t help if you spend your time doing one thing and wishing you were doing another. practice effective compartmentalisation.
pay someone to do the housework if you can or just say sod it. Cut corners wherever you can. don't cook. reheat. let everyone live on sandwiches. stop ironing. let everyone wear ther clothes for longer before washing. stop hoovering and see if anyone notices.
Pratice getting into the mind set of switching off from the demands of work the second you steo out of the door. I think this is what is causing you some angst (I may be wrong) - I found this too. Once I was a parent I couldn't be the effective dedicated employee I used to be. don't mean to be harsh but absolutely get over it. prioritise what you are doing right now and practice putting everything else out of your head.
I think you are saying that being a SAHM is not financially viable. but if it was, and if you were tempted to try it again, then I would say:
treat it like a job i.e. schedule your activities and give yourself some structure.
throw yourself into it with as much enthusiasm as you can at the beginning and don't even think about it for the first few months.
and structure in some time by yourself too - however you need to make it happen.
sorry if I have missed the point entirely.