I need to boost my iron!

Help, I need to boost my iron quick, my ferritin is at 9 and transferrin at 434. I did not realize it was this dangerous until checking with others and of course my Dr. told me to take 324 mg. ferrous sulfate iron? What carbonyl iron and how many mg can I take to boost my iron- sundown naturals perfect iron is being discontinued from what I see online and vitaladys tender iron is on back order, is the Cypress Iron brand (Polysaccharide-150mg Elemental) good to take? Thanks!