I have read Shapiro's book and tried analysing my symptoms and thoughts:). I also read Dying to be me by Anita Moorjani...about a person dying of cancer but once she lost her fears, she was healed....more support of our thoughts effecting our health.
In reading Terry Wahls, I found I don't believe in the higher amounts of meat she recommends, but I am very appreciative of the in-roads she is making with the mainstream medical communities in the USA. She has presented diet and healing to many doctors in traditional hospitals (some people I know we're surprised to hear her speak at their traditional medical work places). She also promotes a wide variety of fruit and vegetables in the diet, which I believe is essential to good health.
I would also recommend Anthony William's Medical Medium book. He recommends low fat, lots of healthy fruits and veges to heal from MS, as well as foods that help get rid of the viruses that actually cause MS. In contrast to Shapiro saying your body's symptoms are telling you something, he explains that your body supports you and would never attack you (is not an autoimmune issue). MS is caused because there are viruses in your body that your immune system is trying to get rid of....and can get rid of when you eat to support it and use herbs to help you. My health has continued to improve following the advice in his book, which does not contradict anything that OMS recommends.
Best wishes on your healing journey!