well houzer, she isn't feeling good right? maybe some serious compassion, flowers when she least expects it, and little note here and there. you may already do these things and from your posts here you do seem to care an awful lot about her. mr. d used to buy me flowers and leave them on my windshield so when i got out of work i would find them. or he would tape them to the front door so i would find them when i got home.
its the little things that you don't always do that show you care the most.
that said, remember she is not feeling well and this could be a little side effect of that. pain affects people very oddly. best to be supportive, never quesstion her pain, and offer to help in any way possible.
i am sure you do most of this already because you do seem to be an awfully caring guy, but you asked so i thought i'd give some ideas
good luck..