Sound very similar to me COVID infection more than a bear ago and Pfizer vaccine a year later. I had slight anemia last year. But my iron levels were good. They did not drop dramatically until after the vaccine. I wonder if the Covid-19 infection caused the anemia and the vaccine exacerbated the iron depletion. Did they find any GI bleeding with you? Did you have intense GI symptoms with COVID infection? I did. Please keep me updated on your progress