I'm new here and wondering if someone could please help me. I've just had a blood test done last Friday as I was feeling dizzy and exhausted a lot of the time. I asked for a full blood count and most of the result is showing below range especially the haemoglobin concentration. The doctor has said I have severe iron deficiency and it has been suggested I need a blood transfusion. My vitamin D level was also very low. The result I am most worried about is my vitamin B12 as I had a blood test done a few years ago and I was told it was low then but just to take some tablets and I don't have a copy of those results. On this recent test my ferritin level is well below the low range at 5ug/L. So far the GP has given me iron tablets and vitamin D tablets and told me to come back for another blood test in a month. I'm just asking for some advice as to what other test I could ask for to determine what is the cause of all this. Please could somebody help?