Hello @StarGirl, are you on chemo or recently finished? If your bone marrow is suppressed it may not make many red cells effectively even though you have enough iron on board. This happened to me and though my iron stores were fine, I needed blood to correct the anaemia. I had 9 units during chemo. I was constantly short of breath, but didn’t get blood until haemoglobin was quite low. Now in RT and its getting low again. I takes quite a while for the bone marrow to recover in some of us. Hope you feel better soon Tinks xx