Hi. I have had fatigue for my entire life to some extent. I am a 46 yo female. I was diagnosed with Hashimotos at 19. Recently I experienced some extreme fatigue and tingling in hands and feet. I asked to be tested for B12 since my mother had PA and Hashi's. Was given an endoscopy and colonoscopy to rule out gut issues. No inflammation and biopsies were normal. I am guessing they did not show IF antibodies. I eat a healthy diet and have no clue what could make B!2 drop to 211. I am to see a hematologist but am worries there won't be a determined cause. Any advice?