My Hb has generally remained around 8–10 g/dL. I currently have severe tiredness/fatigue, dizziness, weakness and frequent body pains. I also have significant menstrual cramps. My periods usually last around 6 days, although the amount of bleeding varies. I had a sonography done because of the menstrual cramps, but it was normal.
Recent CBC: Hb 10.4 g/dL, HCT 33.5%, RBC 4.32 ×10⁶/µL, MCV 77.5 fL, MCH 24.2 pg, MCHC 31.1 g/dL, RDW-CV 15.2%, RDW-SD 41.7 fL, WBC 9.3 ×10³/µL, platelets 305 ×10³/µL.
Iron profile: Serum iron 28.3 µg/dL (ref 50–170), TIBC 410.5 µg/dL, transferrin saturation 6.89% (ref 15–45%), UIBC 382.2 µg/dL, and
ferritin 4 µg/L.
Vitamin B12: 311; Vitamin D3: 33.29.
Given my recurrent low Hb and very low ferritin, I would like to know how significant my iron deficiency is, whether it could explain my symptoms, why my anemia keeps recurring, and what investigations I should undergo to identify the cause. Would oral iron or IV iron be appropriate in my case?