Sorry to hear your mom is suffering so much, but what a gift and responsibility for you to be able to help improve her health.
If she really wants to recover from her health problems - please add fish oil and Vit D supplements. She needs to add good quality fats to every meal - butter, or olive oil, or coconut oil or animal fats. No vegetables without added fats! Eggs are highly nutritious for body and brain. Daily bone broths for rebuilding bones and joints. Eliminate all inflammatory vegetable oils. NO GRAINS period. Some red wine, a little dark chocolate for the anti-inflammatory properties.
I am 54 and have been eating primal over a year now. I am completely free of all previous joint pain and tendonitis. it took a few months, but it has been great. I don't think I eat any different from younger primals. When I learned that the lectins or phytates from grains would bind to minerals making them impossible to absorb, I felt so much better about doing this as I head into menopause - a time when I will need all the calcium I can absorb to keep my bones strong and healthy.
If your mom isn't prioritizing sleep, that should be number two on her to do list.
I also have to say I was shocked to hear she is only eating one piece of bread with some almond butter per day. That is not enough to sustain a 52 year old woman. Even if she ate the same amount of calories in a primal food form, that is no where near enough food to get adequate nutrition. Are you sure she doesn't have an eating disorder? You may be up against a bigger problem than just an inflammatory diet.....