Have you ever had your ferritin iron checked? Not Hemoglobin iron but Ferritin. Google low ferritin hair loss. Most doctors don't bother looking at ferritn or its relation with hair loss, but if it is under 70 you will be losing hair. My hair did not stop falling out and start regrowing until mine had reached 75. Anyways just wanted to let you know what worked for me. Good luck!