Hmmm, I am totally out of sync with other people.
I think there are a few things going on here. First off, you can't dismiss how much these changes must be effecting you. These disability issues sound new so you are yourself dealing with a grieving process. You have changed and your life has changed. That is never easy and it will change the way you deal with the world around you. There is resentment, anger and sadness on your part that your daughter MUST be feeling as it oozes out of you into everything you say and do. Second, your daughter went from having a ton of independence to being accountable all day, every day and that is not an easy thing to get used to. Not only that but now you are probably leaning on her more than you realize because she IS ok and you are not.
Then there is the separate issue of compassion. Kids aren't born with it, well they feel for other people but realizing they have the power to make someone else's world better is a slow to develop sort of trait. I've always had migraines and I've always been a SAHM so my kids have always seen the realities of my issues since they were babies, they don't question the validity of me being in need and will even try to care for me. But this didn't happen overnight. If you want genuine compassion show genuine feelings. Let your daughter see some of the vulnerabilities and talk about them. Tell her you wish you could do everything like you've always done but you can't and that you need her to help you find your way as a family.
Personally, I feel that 75% conversation and 25% tough does a very good job of creating compassionate & kind kids... but that's just me. My kids get yelled at and punished when they deserve it but I just make sure that for every negative that comes out of my mouth there are at least 3 positives, usually many more than that. I am their Mom they NEED love from me and they certainly don't want to drive me away, it's my job to bridge the gaps when they don't know how.
If you want compassion show compassion... it's like that poem "Children learn what they live"