J.,
You are not worrying too much! You are fulfilling your responsibility to your daughter to be her advocate. I would also say that there is no reason to suppose that breastfeeding has caused her anemia. This is one of those pseudo-medicine myths. While it is true that breastmilk contains less iron, the iron that is in it is highly absorbable (about 70% absorbed). Formula and fortified cereals have much more iron in them, but it is much less available to your baby (around 3-10% absorbed). I think doctors are just predisposed to love anything they can assign a number to, and as you know, there is no way to quantify breastfeeding!
I would call into the doctors office and ask what the RANGE of normal is for her age. (It also varies based on gender.) You said she is only "slightly anemic," so you should be doing great just by bumping up her consumed iron and skipping the supplement. Even if you do choose to supplement, there is no reason for her to be taking a double dose when she is only "slightly anemic." While it's unlikely that she will suffer from acute iron poisoning, she will probably suffer from constipation, and there is no reason to fill her up with some synthetic junk that she doesn't need anyway! Here are some foods high in iron:
*Beef, Pork, Lamb, Turkey, Chicken (Brown meat has slightly more iron than white meat.)
*Green Leafy Vegetables: Spinach, Asparagus, Broccoli, Collard Greens, Mustard Greens, Kale, Turnip Greens, Parsley, Cabbage
*Liver, Tofu, Barley, Fish: Tuna Potato (I have heard that babies love tofu chunks.)
*Salmon, Shrimp, Tuna, Oysters, Clams, and most kinds of seafood. (I have read that babies should only eat seafood once a week due to possible mercury buildup.)
*Most kind of Dried Beans: Lima Beans, Kidney Beans, Navy Beans, Soy Beans, Chick Beans, Pinto Beans, Black Eye Beans (Beans are one of the best first baby foods, and so easy to cook. My 1-year old loves feeding herself beans!)
*Cereals, Oatmeal, Pasta, Rice, Grits (Again, fortified foods are less available to the body because they are "fake" iron sources, and also more likely to constipate.)
Mentioned before, vitamin c boosts iron absorption, so if you can offer her a food rich in vitamin C with her meat, you will help her get the best out of her food. Foods high in vitamin C:
Citrus fruits
Strawberries
broccoli
green & red peppers (My babe LOVES diced red peppers)
brussels sprouts
honeydew & cantaloupe melons
tomatoes
cabbage
cauliflower
most juices are C fortified (Only offer a little daily, and water it down to reduce sugar intake.)
red and black currants
Kakadu plums
parsley (Could dice it finely and mix it in with other foods.)
kiwi fruit
guavas
papayas
Also, iron and calcium interfere with each other, so you might try for a calcium rich meal in the morning and an iron rich meal in the evening.
My daughters' doctor told me that iron-deficient anemia is only damaging when it is severe. They want to keep it from going downhill, of course, but it is not like this is a life-threatening issue that needs to be resolved immediately. If you are really concerned about her being anemic, you could give it a one-month trail run of offering iron and vitamin C rich foods and no supplementing, and then get her levels retested. If her doctor put her on a double dose of iron, I assume he set a date to retest her? If not, I would be concerned about the quality of care. Just my opinion! I would call in and let him know that you are concerned about the level of supplementation he has recommended. Share whatever alternative plan you have (increasing iron-rich foods, reducing the supplement, etc.) and arrange a date to have her iron retested. Be prepared to be told that you are worrying over nothing, that the supplement is perfectly safe, that you are putting your daughter's health at risk! I've heard it all! Be firm that this is the course you have chosen, and if they have logical reason why something you are proposing is dangerous, you are open to discuss it. Otherwise, this is what you are going to do. You can be respectful and still stand by your decision. Remember, you are your daughter's best advocate!
Best of luck,
S.