my baby is 18 months and she became with a low iron of 9.6 is this really bad? her doctor give me iron that she will have to take for one month, but I'm scare because this is not the firs time it happens ,when she was 10 month her level of iron was 10.8 can this be something else? and she eats really good beans, meet, vegetables, oat. cereals , and I'm breatsfeeding her.