Should I have said something??

Background: my MIL and me used to have a great relationship. Then me and hub got pregnant and we moved into her house to save money for our own. Baby came early due to preeclampsia and she was in the NICU for almost 3 months. When she came home she had a lot of medical needs as well and ended up having surgery at 6 months. MIL doesn’t “do domestic” so we’ve always done the household tasks for years. During our NICU days we still did the cooking cleaning and everything else for the entire house with no help. She never came to see her granddaughter and belittled us when we asked for help doing HER OWN stuff at home. She constantly kicked me when I was down and brought up her own struggles as a single mom saying “you’re lucky there’s 2 of you”. My baby is now 14 months, she’s been wanting to be involved and “help” (do her own shit) for a couple months. I’ve been trying to just move on from all the hurtful mean things she’s said/did. Tonight I was doing the dishes and we were talking having a fine time. Then she mentioned how stress gives you cancer and she wishes she told me and her son to just breathe. And I said “what do you mean? Just in life in general?” And she said “no when you were going through everything last year I wish you would just breathe and not let stress get to you”. Needless to say I didn’t take that well and hubs came home from work mid-argument. I just feel like how dare she even comment on our stress during that time when I asked for help a couple times and she basically said fuck you. (She would actually add stuff on for us to do) My husband’s mad I even said anything but he stood up for me anyway and tried to smooth things over. I ended up telling her how much she hurt me and she claims she did nothing wrong and I’m making things up in my head. She’s NEVER wrong tho so that’s expected. Should I have just said “yeah we shoulda just breathed”??