Tell me exactly what I did wrong.

[Kettricken]

Sometimes there is no right way to say it. I don't see that you said anything wrong, unless you said it in a really "poor pitiful me" tone of voice, which doesn't sound like you ...

The only guilt trip involved is the one he's treating himself to. Sounds like he knows damned well he's treating you shabbily but at the same time feels totally overloaded with trying to respond flawlessly to his mom's needs/demands and is frustrated because he feels caught in the middle and overstretched. Even though you're NOT being demanding, you get the sharp end because you are one of the things he's feeling pressured about, so you're involved in his guilt/martyr complex whether you want to be there or not ... and he'd rather get snappy with you than his mom.

This sucks because it's reasonable to expect your SO to BE THERE for you when you're incapacitated, but you might want to remove yourself from this equation as much as possible for the time being .... do you have much of a support system where you live? Friends, neighbors, family, church community .... anyone who'd be more than happy to do a store run etc for you for awhile? Last resort, there's always the pizza delivery as per Lou; some places have grocery delivery too, although again I don't know your situation.