Ada je yang macam ni, usually it means your body still punya iron stores yang ok even though hemoglobin currently low, bisa jadi due to inflammation, chronic disease, or sometimes malabsorption issues. Best to follow up dengan doctor pasal apa penyebab HB low tu, sebab kalau ferritin normal tapi HB turun, treatment approach dia might be different from typical iron deficiency anemia. Jangan self-supplement iron without checking with your doc first, nanti lagi banyak masalah. Did your doctor suggest what might be causing it?