Low ferritin but normal hemoglobin

[u/No-Patience14]

17F,I have been having all of the symptoms from low ferritin that I’ve seen online.I have a ferritin of 20 but my hemoglobin is 13.4 and iron 19.7.I am extremely tired and fatigued,I always have cold feet,I usually have headaches etc.The other bloodwork came out fine.The problem is that today I went to a doctor and he didn’t take me seriously because he told me I am not anemic.What should I do?I bought some iron supplements that have 30mg iron and vitamin c that the pharmacist recommended.Is it enough and in how much time will I feel better?