Sunflower, its a bit like being an alcoholic, admitting there's a problem is a huge step, it doesn't mean you're magically cured but its vital to take that first step towards recovering yourself, so posting here is a brilliant move in that respect.
Once you start to take note of things that happen within your relationship, read about others' experiences etc you will gain the strength you need to make the right decisions for you. In the meantime this is a great place to let it out, share your situation with people who understand and get some perspective.
There is no rush to make changes, you need to make them when you feel able to, but you will find that just acknowledging that there is a problem and having support from like-minded people will help you.
FWIW, it sounds to me like your H expects an awful lot from a wife and even one in perfectly good health would be unlikely to give him what he seems to want (a perfectly tidy house, domestic servant and sex every day) - the fact he makes no allowance for your illness, especially taking time off while you were ill, then leaving you alone with all his mess when you got home is spectacularly selfish.
I must admit, this is one area where I knew my X would let me down - I remember my darling dad visiting my mum in hospital every day when she had a stroke. Then he came home, looked after us all and worked all night to keep the money coming in. I knew in my heart that my H would have come up with 101 excuses not to visit me, to keep working instead, thinking of the practicalities, the money, what is sensible, but never thinking of ME. A loving supportive partner would never behave that way.
I hope you start to get some clarity on your situation from this thread and start blooming into the bright, cheerful and optimistic flower you can be, even with your illness to contend with xxx