At the age of 35, I was diagnosed with hashimotos. Two years ago at the age of 40, I was diagnosed with pernicious anemia, testing positive for both intrinsic factor and parietal cell antibodies. I'm now on a b12 monthly maintenance schedule and doing well. Like many here, I've also known what it's like to be discounted by doctors and feeling helpless. Thankfully through personal education from forums like these, the PAS website, and recommended books - my sense of empowerment has been restored.
At my worst I began my healing journey following the Specific Carbohydrate Diet and transitioning over to lighter version of Auto Immune Paleo Diet. Recently I came across the Medical Medium book series and am seeing great results. I would highly recommend any of these diets (or all three).
As my health improves and I start feeling better, I have the tendency to sabotage myself by falling back to the Standard American diet. This usually leads to starting the cycle all over. But as Anthony Robins would say, it's all about the progress. So no matter where you are in the journey, I encourage anyone to continue educating yourself. An open mind helps for sure. You just never know what may do the trick in breaking through that next level in your healing journey.