Hello everyone, 23 weeks pregnant, recently passed the blood test (hem…

Hello everyone, 23 weeks pregnant, recently passed the blood test (hemoglobin 110), but ferritin was 53.75 a month ago, I tried Hema Plex and an over-the-counter drug, after taking pills strong nausea and vomiting occurred, I'm silent about constipation, what did you take during pregnancy? B12 and folic acid are in normal range too, is it possible that my body isn't absorbing iron? I'm afraid that the baby will not have enough oxygen due to anemia, advise me what can be drunk? ??????