I have Iron deficiency anaemia

Patient: Hello, im a 13 year old girl and I recently had a blood test. For the past year I have been experiencing the symptoms of Iron deficiency anemia but when i got my blood test it said my hb level is 12.6, everybody says its normal but i still experience iron deficiancy, what do i do?

Symptoms: Chest pain, Rising of pulse rate, Anxiety, Depression, Pale skin, Mood swings, Brittle nails, Heavy periods, Gingivitis