So... sometimes we have to do what we can, and eventually get the the harder stuff. Getting stress out of your life isn't going to be easy with your husband sick! But do what you can to help a little bit with the stress - meditate, or if that's too much, just spend 5 minutes quietly breathing twice a day. If a support group would help, try to get to one (assuming you have time). Or a hot bath, or a half hour of listening to some relaxing music.
Think in terms of "art of the possible". Cut a few sugary things out of your diet. Cut out as much dairy as you can. Food changes usually require also figuring what you ARE going to eat, and developing new habits around shopping and cooking. Given you have a lot else going on, give yourself time to think about if you didn't eat a donut, what else might taste good. etc. You can think about it in terms of meals, too. Maybe start by changing one meal so that it has less of the no-nos. Or if it's snacks that are your downfall (definitely mine!) are there ways to make sure you have something to eat that isn't a sweet.
So break it down in bits, and do some now, and gradually work yourself into new patterns.
In fibro, exercise EVENTUALLY helps, but not necessarily immediately. Google fibro and exercise, as I don't remember the details!
Hang in there. You can't "fix it all at once". It will take time.
